56567657 has 4 divisors (see below), whose sum is σ = 56589456. Its totient is φ = 56545860.

The previous prime is 56567639. The next prime is 56567663. The reversal of 56567657 is 75676565.

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 a cyclic number.

It is not a de Polignac number, because 56567657 - 2²⁴ = 39790441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56567677) 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, 6383 + ... + 12404.

It is an arithmetic number, because the mean of its divisors is an integer number (14147364).

Almost surely, 2^56567657 is an apocalyptic number.

It is an amenable number.

56567657 is a deficient number, since it is larger than the sum of its proper divisors (21799).

56567657 is a wasteful number, since it uses less digits than its factorization.

56567657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21798.

The product of its digits is 1323000, while the sum is 47.

The square root of 56567657 is about 7521.1473193922. The cubic root of 56567657 is about 383.8746177203.

The spelling of 56567657 in words is "fifty-six million, five hundred sixty-seven thousand, six hundred fifty-seven".