I know we can filter contest results to show only friends. But MikeMirzayanov has 6554 friends and as far as I know does not participate into contests. So does it mean something special to have a lot of friends on CF? Let's use Codeforces API to get the list of all rated users and then sort it by friendOfCount value.
The top is tourist with 35053 friend. No wonder. He is very popular, even babies know him) My family live in Belarus where is tourist originally from. Gennady tourist Korotkevich is well-know here, his victories always described in news, but there was a classical belorussian writer with the same surname — Vladimir Korotkevich. Once in the evening we had a usual family talk about everything and my oldest mentioned that he had to write an essay for school about Korotkevich. My youngest was completely taken aback. She said "I knew that tourist is great but I did not know how great he is — school essay, oh my god!.."
You can see the table of users who has more 2500 friends below.
There are 353 878 users, 126333 have no friends, 52044 — 1 friend. 64203 have more 10 friends, 5665 of them more then 100 and only 180 more then 1000.