56657875665 has 8 divisors (see below), whose sum is σ = 90652601088. Its totient is φ = 30217533680.

The previous prime is 56657875579. The next prime is 56657875709.

56657875665 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 56657875665 - 2¹⁶ = 56657810129 is a prime.

It is a super-2 number, since 2×56657875665² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56657875596 and 56657875605.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1888595841 + ... + 1888595870.

It is an arithmetic number, because the mean of its divisors is an integer number (11331575136).

Almost surely, 2^56657875665 is an apocalyptic number.

It is an amenable number.

56657875665 is a deficient number, since it is larger than the sum of its proper divisors (33994725423).

56657875665 is a wasteful number, since it uses less digits than its factorization.

56657875665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3777191719.

The product of its digits is 317520000, while the sum is 66.

The spelling of 56657875665 in words is "fifty-six billion, six hundred fifty-seven million, eight hundred seventy-five thousand, six hundred sixty-five".