56570665 has 4 divisors (see below), whose sum is σ = 67884804. Its totient is φ = 45256528.

The previous prime is 56570641. The next prime is 56570687. The reversal of 56570665 is 56607565.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13366336 + 43204329 = 3656^2 + 6573^2 .

It is a cyclic number.

It is not a de Polignac number, because 56570665 - 2⁹ = 56570153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5657062 + ... + 5657071.

It is an arithmetic number, because the mean of its divisors is an integer number (16971201).

Almost surely, 2^56570665 is an apocalyptic number.

It is an amenable number.

56570665 is a deficient number, since it is larger than the sum of its proper divisors (11314139).

56570665 is a wasteful number, since it uses less digits than its factorization.

56570665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11314138.

The product of its (nonzero) digits is 189000, while the sum is 40.

The square root of 56570665 is about 7521.3472862247. The cubic root of 56570665 is about 383.8814218109.

The spelling of 56570665 in words is "fifty-six million, five hundred seventy thousand, six hundred sixty-five".