664646551095075 has 24 divisors (see below), whose sum is σ = 1113935479981488. Its totient is φ = 349622295367680.

The previous prime is 664646551095067. The next prime is 664646551095091. The reversal of 664646551095075 is 570590155646466.

It is not a de Polignac number, because 664646551095075 - 2³ = 664646551095067 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60698309694 + ... + 60698320643.

It is an arithmetic number, because the mean of its divisors is an integer number (46413978332562).

Almost surely, 2^{664646551095075} is an apocalyptic number.

664646551095075 is a deficient number, since it is larger than the sum of its proper divisors (449288928886413).

664646551095075 is a wasteful number, since it uses less digits than its factorization.

664646551095075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121396630423 (or 121396630418 counting only the distinct ones).

The product of its (nonzero) digits is 816480000, while the sum is 69.

The spelling of 664646551095075 in words is "six hundred sixty-four trillion, six hundred forty-six billion, five hundred fifty-one million, ninety-five thousand, seventy-five".