56642566 has 16 divisors (see below), whose sum is σ = 87717168. Its totient is φ = 27414400.

The previous prime is 56642563. The next prime is 56642627. The reversal of 56642566 is 66524665.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56642563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8106 + ... + 13378.

It is an arithmetic number, because the mean of its divisors is an integer number (5482323).

Almost surely, 2^56642566 is an apocalyptic number.

56642566 is a deficient number, since it is larger than the sum of its proper divisors (31074602).

56642566 is a wasteful number, since it uses less digits than its factorization.

56642566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5447.

The product of its digits is 259200, while the sum is 40.

The square root of 56642566 is about 7526.1255636616. The cubic root of 56642566 is about 384.0439900053.

The spelling of 56642566 in words is "fifty-six million, six hundred forty-two thousand, five hundred sixty-six".