56566564 has 6 divisors (see below), whose sum is σ = 98991494. Its totient is φ = 28283280.

The previous prime is 56566561. The next prime is 56566567. The reversal of 56566564 is 46566565.

56566564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56566561) and next prime (56566567).

It can be written as a sum of positive squares in only one way, i.e., 56400100 + 166464 = 7510^2 + 408^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 56566564.

It is not an unprimeable number, because it can be changed into a prime (56566561) by changing a digit.

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 as a sum of consecutive naturals, namely, 7070817 + ... + 7070824.

Almost surely, 2^56566564 is an apocalyptic number.

It is an amenable number.

56566564 is a deficient number, since it is larger than the sum of its proper divisors (42424930).

56566564 is a wasteful number, since it uses less digits than its factorization.

56566564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14141645 (or 14141643 counting only the distinct ones).

The product of its digits is 648000, while the sum is 43.

The square root of 56566564 is about 7521.0746572548. The cubic root of 56566564 is about 383.8721452966.

Subtracting from 56566564 its reverse (46566565), we obtain a palindrome (9999999).

The spelling of 56566564 in words is "fifty-six million, five hundred sixty-six thousand, five hundred sixty-four".