566620433661 has 8 divisors (see below), whose sum is σ = 756111654720. Its totient is φ = 377438084192.

The previous prime is 566620433651. The next prime is 566620433669. The reversal of 566620433661 is 166334026665.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-566620433661 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 566620433661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566620433669) 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, 77213616 + ... + 77220953.

It is an arithmetic number, because the mean of its divisors is an integer number (94513956840).

Almost surely, 2^566620433661 is an apocalyptic number.

It is an amenable number.

566620433661 is a deficient number, since it is larger than the sum of its proper divisors (189491221059).

566620433661 is a wasteful number, since it uses less digits than its factorization.

566620433661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154435795.

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 566620433661 in words is "five hundred sixty-six billion, six hundred twenty million, four hundred thirty-three thousand, six hundred sixty-one".