56668815 has 56 divisors (see below), whose sum is σ = 116575008. Its totient is φ = 25894080.

The previous prime is 56668783. The next prime is 56668841. The reversal of 56668815 is 51886665.

56668815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 56668815 - 2⁵ = 56668783 is a prime.

It is a super-2 number, since 2×56668815² = 6422709187008450, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 24405 + ... + 26625.

Almost surely, 2^56668815 is an apocalyptic number.

56668815 is an abundant number, since it is smaller than the sum of its proper divisors (59906193).

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

56668815 is an equidigital number, since it uses as much as digits as its factorization.

56668815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251 (or 2236 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 56668815 is about 7527.8692204368. The cubic root of 56668815 is about 384.1033047257.

The spelling of 56668815 in words is "fifty-six million, six hundred sixty-eight thousand, eight hundred fifteen".