56625700661 has 8 divisors (see below), whose sum is σ = 56857559640. Its totient is φ = 56394104832.

The previous prime is 56625700657. The next prime is 56625700679. The reversal of 56625700661 is 16600752665.

It can be written as a sum of positive squares in 4 ways, for example, as 23926211761 + 32699488900 = 154681^2 + 180830^2 .

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 56625700661 - 2² = 56625700657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56625700561) 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, 371381 + ... + 501173.

It is an arithmetic number, because the mean of its divisors is an integer number (7107194955).

Almost surely, 2^56625700661 is an apocalyptic number.

It is an amenable number.

56625700661 is a deficient number, since it is larger than the sum of its proper divisors (231858979).

56625700661 is a wasteful number, since it uses less digits than its factorization.

56625700661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131575.

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 56625700661 in words is "fifty-six billion, six hundred twenty-five million, seven hundred thousand, six hundred sixty-one".