56656663 has 4 divisors (see below), whose sum is σ = 64750480. Its totient is φ = 48562848.

The previous prime is 56656643. The next prime is 56656673. The reversal of 56656663 is 36665665.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56656663 - 2²⁵ = 23102231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56656603) 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 3 ways as a sum of consecutive naturals, for example, 4046898 + ... + 4046911.

It is an arithmetic number, because the mean of its divisors is an integer number (16187620).

Almost surely, 2^56656663 is an apocalyptic number.

56656663 is a deficient number, since it is larger than the sum of its proper divisors (8093817).

56656663 is an equidigital number, since it uses as much as digits as its factorization.

56656663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8093816.

The product of its digits is 583200, while the sum is 43.

The square root of 56656663 is about 7527.0620430550. The cubic root of 56656663 is about 384.0758471959.

The spelling of 56656663 in words is "fifty-six million, six hundred fifty-six thousand, six hundred sixty-three".