566115616661 has 16 divisors (see below), whose sum is σ = 648100416768. Its totient is φ = 484409203200.

The previous prime is 566115616543. The next prime is 566115616663. The reversal of 566115616661 is 166616511665.

It is a cyclic number.

It is not a de Polignac number, because 566115616661 - 2¹⁴ = 566115600277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (566115616663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11965031 + ... + 12012251.

It is an arithmetic number, because the mean of its divisors is an integer number (40506276048).

Almost surely, 2^566115616661 is an apocalyptic number.

It is an amenable number.

566115616661 is a deficient number, since it is larger than the sum of its proper divisors (81984800107).

566115616661 is a wasteful number, since it uses less digits than its factorization.

566115616661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50132.

The product of its digits is 1166400, while the sum is 50.

The spelling of 566115616661 in words is "five hundred sixty-six billion, one hundred fifteen million, six hundred sixteen thousand, six hundred sixty-one".