56656643 has 2 divisors, whose sum is σ = 56656644. Its totient is φ = 56656642.

The previous prime is 56656637. The next prime is 56656673. The reversal of 56656643 is 34665665.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56656643 - 2⁴ = 56656627 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56656643.

It is not a weakly prime, because it can be changed into another prime (56656603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28328321 + 28328322.

It is an arithmetic number, because the mean of its divisors is an integer number (28328322).

Almost surely, 2^56656643 is an apocalyptic number.

56656643 is a deficient number, since it is larger than the sum of its proper divisors (1).

56656643 is an equidigital number, since it uses as much as digits as its factorization.

56656643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 388800, while the sum is 41.

The square root of 56656643 is about 7527.0607145153. The cubic root of 56656643 is about 384.0758020025.

The spelling of 56656643 in words is "fifty-six million, six hundred fifty-six thousand, six hundred forty-three".