Όπου κι αν βρισκόμαστε, θυμόμαστε τον αριθμό έκτακτης ανάγκης.

As a fixed expression, όπου κι αν means wherever or no matter where.

Compare:

• όπου βρισκόμαστε = where we are
• όπου κι αν βρισκόμαστε = wherever we are

So the extra words make the meaning more general and non-specific.

Not really. On its own, αν often means if, but in the pattern όπου κι αν it helps create the meaning wherever / no matter where.

So it is better to understand όπου κι αν as one unit, rather than translating each word separately.

Yes. κι is a shortened form of και. It is very common before vowels and in everyday speech.

So these mean the same thing:

• όπου κι αν
• όπου και αν

In this sentence, κι is simply the more natural, compact form.

βρισκόμαστε is the 1st person plural, present tense form of βρίσκομαι.

So:

• βρίσκομαι = I am located / I find myself
• βρισκόμαστε = we are located / we find ourselves

Here it means we are, specifically in the sense of where we are.

είμαστε simply means we are.
βρισκόμαστε is often used when talking about location or the situation we are in.

Because the sentence is about place, βρισκόμαστε sounds very natural:

• Πού είμαστε; = Where are we?
• Πού βρισκόμαστε; = Where are we located?

So όπου κι αν βρισκόμαστε fits especially well with the idea of physical location.

The ending -μαστε marks the 1st person plural of many verbs with middle/passive-type forms in Modern Greek.

That does not always mean the verb is passive in meaning. In fact, both verbs here are active in meaning:

• βρισκόμαστε = we are / we are located
• θυμόμαστε = we remember

This is very common in Greek. Learners often notice that some verbs look passive but translate actively.

The dictionary form is θυμάμαι, which means I remember.

So:

• θυμάμαι = I remember
• θυμόμαστε = we remember

Like βρίσκομαι, it uses middle/passive-style endings but has an active meaning.

Because τον αριθμό is the direct object of the verb θυμόμαστε.

The basic form is:

• ο αριθμός = the number

But after a verb, the direct object goes in the accusative:

• θυμόμαστε τον αριθμό = we remember the number

So:

• ο αριθμός = nominative
• τον αριθμό = accusative

Because Greek often uses the genitive to mean of ....

The basic phrase is:

• έκτακτη ανάγκη = emergency

In this sentence, it modifies αριθμό:

• αριθμός έκτακτης ανάγκης = literally number of emergency, meaning emergency number

Both words change into the genitive:

• έκτακτη → έκτακτης
• ανάγκη → ανάγκης

Because αριθμός έκτακτης ανάγκης functions like a fixed descriptive phrase, much like emergency number in English.

Greek often leaves out the article in this kind of expression. So:

• τον αριθμό έκτακτης ανάγκης = the emergency number

Adding της would usually sound less natural here.

Yes. Όπου και να βρισκόμαστε is a very common alternative, and it means essentially the same thing: wherever we are / no matter where we are.

So both of these are natural:

• Όπου κι αν βρισκόμαστε
• Όπου και να βρισκόμαστε

The comma separates the introductory clause from the main clause:

• Όπου κι αν βρισκόμαστε = introductory idea
• θυμόμαστε τον αριθμό έκτακτης ανάγκης = main statement

This punctuation makes the structure clear. Greek word order is fairly flexible, but this order is very natural because it gives the condition/background first and the main point second.