666565563135 has 8 divisors (see below), whose sum is σ = 1066504901040. Its totient is φ = 355501633664.

The previous prime is 666565563073. The next prime is 666565563163. The reversal of 666565563135 is 531365565666.

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

It is a cyclic number.

It is not a de Polignac number, because 666565563135 - 2⁹ = 666565562623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22218852090 + ... + 22218852119.

It is an arithmetic number, because the mean of its divisors is an integer number (133313112630).

Almost surely, 2^666565563135 is an apocalyptic number.

666565563135 is a deficient number, since it is larger than the sum of its proper divisors (399939337905).

666565563135 is a wasteful number, since it uses less digits than its factorization.

666565563135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44437704217.

The product of its digits is 43740000, while the sum is 57.

The spelling of 666565563135 in words is "six hundred sixty-six billion, five hundred sixty-five million, five hundred sixty-three thousand, one hundred thirty-five".