56656556 has 72 divisors (see below), whose sum is σ = 117752880. Its totient is φ = 23760000.

The previous prime is 56656507. The next prime is 56656577. The reversal of 56656556 is 65565665.

It is a super-2 number, since 2×56656556² = 6419930675562272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 560906 + ... + 561006.

Almost surely, 2^56656556 is an apocalyptic number.

It is an amenable number.

56656556 is an abundant number, since it is smaller than the sum of its proper divisors (61096324).

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

56656556 is a wasteful number, since it uses less digits than its factorization.

56656556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 194 counting only the distinct ones).

The product of its digits is 810000, while the sum is 44.

The square root of 56656556 is about 7527.0549353648. The cubic root of 56656556 is about 384.0756054112.

Adding to 56656556 its reverse (65565665), we get a palindrome (122222221).

It can be divided in two parts, 5665 and 6556, that added together give a palindrome (12221).

The spelling of 56656556 in words is "fifty-six million, six hundred fifty-six thousand, five hundred fifty-six".