566656561015 has 4 divisors (see below), whose sum is σ = 679987873224. Its totient is φ = 453325248808.

The previous prime is 566656560997. The next prime is 566656561043. The reversal of 566656561015 is 510165656665.

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

It is a cyclic number.

It is not a de Polignac number, because 566656561015 - 2¹⁵ = 566656528247 is a prime.

It is a Duffinian number.

It is a congruent 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, 56665656097 + ... + 56665656106.

It is an arithmetic number, because the mean of its divisors is an integer number (169996968306).

Almost surely, 2^566656561015 is an apocalyptic number.

566656561015 is a deficient number, since it is larger than the sum of its proper divisors (113331312209).

566656561015 is a wasteful number, since it uses less digits than its factorization.

566656561015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113331312208.

The product of its (nonzero) digits is 4860000, while the sum is 52.

The spelling of 566656561015 in words is "five hundred sixty-six billion, six hundred fifty-six million, five hundred sixty-one thousand, fifteen".