56656665 has 96 divisors (see below), whose sum is σ = 116678016. Its totient is φ = 26127360.

The previous prime is 56656643. The next prime is 56656673. The reversal of 56656665 is 56665665.

It is not a de Polignac number, because 56656665 - 2⁸ = 56656409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 56656665.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 268410 + ... + 268620.

It is an arithmetic number, because the mean of its divisors is an integer number (1215396).

Almost surely, 2^56656665 is an apocalyptic number.

It is an amenable number.

56656665 is an abundant number, since it is smaller than the sum of its proper divisors (60021351).

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

56656665 is a wasteful number, since it uses less digits than its factorization.

56656665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 249 counting only the distinct ones).

The product of its digits is 972000, while the sum is 45.

The square root of 56656665 is about 7527.0621759090. The cubic root of 56656665 is about 384.0758517152.

The spelling of 56656665 in words is "fifty-six million, six hundred fifty-six thousand, six hundred sixty-five".