56666562 has 16 divisors (see below), whose sum is σ = 114337440. Its totient is φ = 18721472.

The previous prime is 56666557. The next prime is 56666563. The reversal of 56666562 is 26566665.

It is a super-2 number, since 2×56666562² = 6422198497799688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (56666563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41112 + ... + 42467.

It is an arithmetic number, because the mean of its divisors is an integer number (7146090).

Almost surely, 2^56666562 is an apocalyptic number.

56666562 is an abundant number, since it is smaller than the sum of its proper divisors (57670878).

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

56666562 is a wasteful number, since it uses less digits than its factorization.

56666562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83697.

The product of its digits is 388800, while the sum is 42.

The square root of 56666562 is about 7527.7195750107. The cubic root of 56666562 is about 384.0982143527.

The spelling of 56666562 in words is "fifty-six million, six hundred sixty-six thousand, five hundred sixty-two".