56656791 has 12 divisors (see below), whose sum is σ = 81904680. Its totient is φ = 37740240.

The previous prime is 56656781. The next prime is 56656811. The reversal of 56656791 is 19765665.

It is not a de Polignac number, because 56656791 - 2¹⁴ = 56640407 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56656771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16221 + ... + 19401.

It is an arithmetic number, because the mean of its divisors is an integer number (6825390).

Almost surely, 2^56656791 is an apocalyptic number.

56656791 is a deficient number, since it is larger than the sum of its proper divisors (25247889).

56656791 is a wasteful number, since it uses less digits than its factorization.

56656791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5166 (or 5163 counting only the distinct ones).

The product of its digits is 340200, while the sum is 45.

The square root of 56656791 is about 7527.0705457037. The cubic root of 56656791 is about 384.0761364332.

The spelling of 56656791 in words is "fifty-six million, six hundred fifty-six thousand, seven hundred ninety-one".