56656505566 has 4 divisors (see below), whose sum is σ = 84984758352. Its totient is φ = 28328252782.

The previous prime is 56656505539. The next prime is 56656505627. The reversal of 56656505566 is 66550565665.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14164126390 + ... + 14164126393.

It is an arithmetic number, because the mean of its divisors is an integer number (21246189588).

Almost surely, 2^56656505566 is an apocalyptic number.

56656505566 is a deficient number, since it is larger than the sum of its proper divisors (28328252786).

56656505566 is a wasteful number, since it uses less digits than its factorization.

56656505566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28328252785.

The product of its (nonzero) digits is 24300000, while the sum is 55.

The spelling of 56656505566 in words is "fifty-six billion, six hundred fifty-six million, five hundred five thousand, five hundred sixty-six".