665165090975 has 96 divisors (see below), whose sum is σ = 1085501952000. Its totient is φ = 400348502400.

The previous prime is 665165090959. The next prime is 665165090983. The reversal of 665165090975 is 579090561566.

It is not a de Polignac number, because 665165090975 - 2⁴ = 665165090959 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2613842 + ... + 2857008.

It is an arithmetic number, because the mean of its divisors is an integer number (11307312000).

Almost surely, 2^665165090975 is an apocalyptic number.

665165090975 is a deficient number, since it is larger than the sum of its proper divisors (420336861025).

665165090975 is a wasteful number, since it uses less digits than its factorization.

665165090975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243238 (or 243219 counting only the distinct ones).

The product of its (nonzero) digits is 15309000, while the sum is 59.

The spelling of 665165090975 in words is "six hundred sixty-five billion, one hundred sixty-five million, ninety thousand, nine hundred seventy-five".