56666790 has 40 divisors (see below), whose sum is σ = 152372880. Its totient is φ = 15110928.

The previous prime is 56666773. The next prime is 56666803. The reversal of 56666790 is 9766665.

It is a super-2 number, since 2×56666790² = 6422250177808200, 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 polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34170 + ... + 35789.

It is an arithmetic number, because the mean of its divisors is an integer number (3809322).

Almost surely, 2^56666790 is an apocalyptic number.

56666790 is an abundant number, since it is smaller than the sum of its proper divisors (95706090).

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

56666790 is a wasteful number, since it uses less digits than its factorization.

56666790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69978 (or 69969 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 56666790 is about 7527.7347190240. The cubic root of 56666790 is about 384.0987294965.

The spelling of 56666790 in words is "fifty-six million, six hundred sixty-six thousand, seven hundred ninety".