566610560661 has 4 divisors (see below), whose sum is σ = 755480747552. Its totient is φ = 377740373772.

The previous prime is 566610560657. The next prime is 566610560701. The reversal of 566610560661 is 166065016665.

566610560661 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 566610560661 - 2² = 566610560657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 566610560661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566610560261) 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, 94435093441 + ... + 94435093446.

It is an arithmetic number, because the mean of its divisors is an integer number (188870186888).

Almost surely, 2^566610560661 is an apocalyptic number.

It is an amenable number.

566610560661 is a deficient number, since it is larger than the sum of its proper divisors (188870186891).

566610560661 is a wasteful number, since it uses less digits than its factorization.

566610560661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188870186890.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 566610560661 in words is "five hundred sixty-six billion, six hundred ten million, five hundred sixty thousand, six hundred sixty-one".