666594618697 has 16 divisors (see below), whose sum is σ = 767423854080. Its totient is φ = 567180831168.

The previous prime is 666594618691. The next prime is 666594618769. The reversal of 666594618697 is 796816495666.

It is not a de Polignac number, because 666594618697 - 2³ = 666594618689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666594618691) 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, 98118 + ... + 1158799.

It is an arithmetic number, because the mean of its divisors is an integer number (47963990880).

Almost surely, 2^666594618697 is an apocalyptic number.

It is an amenable number.

666594618697 is a deficient number, since it is larger than the sum of its proper divisors (100829235383).

666594618697 is a wasteful number, since it uses less digits than its factorization.

666594618697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257480.

The product of its digits is 705438720, while the sum is 73.

The spelling of 666594618697 in words is "six hundred sixty-six billion, five hundred ninety-four million, six hundred eighteen thousand, six hundred ninety-seven".