56566643 has 8 divisors (see below), whose sum is σ = 64888320. Its totient is φ = 48305160.

The previous prime is 56566621. The next prime is 56566669. The reversal of 56566643 is 34666565.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56566643 - 2⁶ = 56566579 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56566643.

It is not an unprimeable number, because it can be changed into a prime (56566603) 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, 13013 + ... + 16806.

It is an arithmetic number, because the mean of its divisors is an integer number (8111040).

Almost surely, 2^56566643 is an apocalyptic number.

56566643 is a deficient number, since it is larger than the sum of its proper divisors (8321677).

56566643 is a wasteful number, since it uses less digits than its factorization.

56566643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30097.

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

The square root of 56566643 is about 7521.0799091620. The cubic root of 56566643 is about 383.8723239998.

The spelling of 56566643 in words is "fifty-six million, five hundred sixty-six thousand, six hundred forty-three".