664516699957 has 16 divisors (see below), whose sum is σ = 730511452224. Its totient is φ = 599456176000.

The previous prime is 664516699943. The next prime is 664516699997. The reversal of 664516699957 is 759996615466.

It is not a de Polignac number, because 664516699957 - 2²⁷ = 664382482229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 664516699957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664516699997) 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, 3727107 + ... + 3901327.

It is an arithmetic number, because the mean of its divisors is an integer number (45656965764).

Almost surely, 2^664516699957 is an apocalyptic number.

It is an amenable number.

664516699957 is a deficient number, since it is larger than the sum of its proper divisors (65994752267).

664516699957 is a wasteful number, since it uses less digits than its factorization.

664516699957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176900.

The product of its digits is 661348800, while the sum is 73.

The spelling of 664516699957 in words is "six hundred sixty-four billion, five hundred sixteen million, six hundred ninety-nine thousand, nine hundred fifty-seven".