165115668 has 12 divisors (see below), whose sum is σ = 385269920. Its totient is φ = 55038552.

The previous prime is 165115661. The next prime is 165115711. The reversal of 165115668 is 866511561.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165115661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6879808 + ... + 6879831.

Almost surely, 2^165115668 is an apocalyptic number.

It is an amenable number.

165115668 is an abundant number, since it is smaller than the sum of its proper divisors (220154252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165115668 is a wasteful number, since it uses less digits than its factorization.

165115668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13759646 (or 13759644 counting only the distinct ones).

The product of its digits is 43200, while the sum is 39.

The square root of 165115668 is about 12849.7341606743. The cubic root of 165115668 is about 548.6087902768.

The spelling of 165115668 in words is "one hundred sixty-five million, one hundred fifteen thousand, six hundred sixty-eight".