666711565017 has 16 divisors (see below), whose sum is σ = 890311168320. Its totient is φ = 443793427200.

The previous prime is 666711564997. The next prime is 666711565033. The reversal of 666711565017 is 710565117666.

It is not a de Polignac number, because 666711565017 - 2¹⁰ = 666711563993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (666711565417) 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, 11314842 + ... + 11373612.

It is an arithmetic number, because the mean of its divisors is an integer number (55644448020).

Almost surely, 2^666711565017 is an apocalyptic number.

It is an amenable number.

666711565017 is a deficient number, since it is larger than the sum of its proper divisors (223599603303).

666711565017 is a wasteful number, since it uses less digits than its factorization.

666711565017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64504.

The product of its (nonzero) digits is 1587600, while the sum is 51.

The spelling of 666711565017 in words is "six hundred sixty-six billion, seven hundred eleven million, five hundred sixty-five thousand, seventeen".