56566641 has 4 divisors (see below), whose sum is σ = 75422192. Its totient is φ = 37711092.

The previous prime is 56566621. The next prime is 56566669. The reversal of 56566641 is 14666565.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 56566641 - 2⁶ = 56566577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56566641.

It is not an unprimeable number, because it can be changed into a prime (56566621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9427771 + ... + 9427776.

It is an arithmetic number, because the mean of its divisors is an integer number (18855548).

Almost surely, 2^56566641 is an apocalyptic number.

It is an amenable number.

56566641 is a deficient number, since it is larger than the sum of its proper divisors (18855551).

56566641 is a wasteful number, since it uses less digits than its factorization.

56566641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18855550.

The product of its digits is 129600, while the sum is 39.

The square root of 56566641 is about 7521.0797762024. The cubic root of 56566641 is about 383.8723194757.

The spelling of 56566641 in words is "fifty-six million, five hundred sixty-six thousand, six hundred forty-one".