55561266 has 12 divisors (see below), whose sum is σ = 120382782. Its totient is φ = 18520416.

The previous prime is 55561243. The next prime is 55561271. The reversal of 55561266 is 66216555.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 32319225 + 23242041 = 5685^2 + 4821^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55561266.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1543351 + ... + 1543386.

Almost surely, 2^55561266 is an apocalyptic number.

55561266 is an abundant number, since it is smaller than the sum of its proper divisors (64821516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55561266 is a wasteful number, since it uses less digits than its factorization.

55561266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086745 (or 3086742 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 55561266 is about 7453.9429834149. The cubic root of 55561266 is about 381.5844873907.

The spelling of 55561266 in words is "fifty-five million, five hundred sixty-one thousand, two hundred sixty-six".