56616660656 has 20 divisors (see below), whose sum is σ = 109745189400. Its totient is φ = 28295321472.

The previous prime is 56616660593. The next prime is 56616660671. The reversal of 56616660656 is 65606661665.

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 56616660598 and 56616660607.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777101 + ... + 846828.

It is an arithmetic number, because the mean of its divisors is an integer number (5487259470).

Almost surely, 2^56616660656 is an apocalyptic number.

It is an amenable number.

56616660656 is a deficient number, since it is larger than the sum of its proper divisors (53128528744).

56616660656 is a wasteful number, since it uses less digits than its factorization.

56616660656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626116 (or 1626110 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 56616660656 in words is "fifty-six billion, six hundred sixteen million, six hundred sixty thousand, six hundred fifty-six".