665111010165 has 80 divisors (see below), whose sum is σ = 1248337848576. Its totient is φ = 302367945600.

The previous prime is 665111010133. The next prime is 665111010203. The reversal of 665111010165 is 561010111566.

It is not a de Polignac number, because 665111010165 - 2⁵ = 665111010133 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6467700 + ... + 6569730.

Almost surely, 2^665111010165 is an apocalyptic number.

It is an amenable number.

665111010165 is a deficient number, since it is larger than the sum of its proper divisors (583226838411).

665111010165 is a wasteful number, since it uses less digits than its factorization.

665111010165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102248 (or 102227 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 33.

The spelling of 665111010165 in words is "six hundred sixty-five billion, one hundred eleven million, ten thousand, one hundred sixty-five".