664664540141675 has 12 divisors (see below), whose sum is σ = 824211300805920. Its totient is φ = 531714037900320.

The previous prime is 664664540141671. The next prime is 664664540141681. The reversal of 664664540141675 is 576141045466466.

It is not a de Polignac number, because 664664540141675 - 2² = 664664540141671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664664540141671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 439084640 + ... + 440595789.

It is an arithmetic number, because the mean of its divisors is an integer number (68684275067160).

Almost surely, 2^{664664540141675} is an apocalyptic number.

664664540141675 is a deficient number, since it is larger than the sum of its proper divisors (159546760664245).

664664540141675 is a wasteful number, since it uses less digits than its factorization.

664664540141675 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879710662 (or 879710657 counting only the distinct ones).

The product of its (nonzero) digits is 348364800, while the sum is 65.

The spelling of 664664540141675 in words is "six hundred sixty-four trillion, six hundred sixty-four billion, five hundred forty million, one hundred forty-one thousand, six hundred seventy-five".