665600600165 has 32 divisors (see below), whose sum is σ = 842392320000. Its totient is φ = 503476077888.

The previous prime is 665600600141. The next prime is 665600600191. The reversal of 665600600165 is 561006006566.

665600600165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 665600600165 - 2⁶ = 665600600101 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 128516546 + ... + 128521724.

It is an arithmetic number, because the mean of its divisors is an integer number (26324760000).

Almost surely, 2^665600600165 is an apocalyptic number.

It is an amenable number.

665600600165 is a deficient number, since it is larger than the sum of its proper divisors (176791719835).

665600600165 is a wasteful number, since it uses less digits than its factorization.

665600600165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7569.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 665600600165 in words is "six hundred sixty-five billion, six hundred million, six hundred thousand, one hundred sixty-five".