165372506 has 16 divisors (see below), whose sum is σ = 267853824. Its totient is φ = 76121904.

The previous prime is 165372503. The next prime is 165372547. The reversal of 165372506 is 605273561.

It is not an unprimeable number, because it can be changed into a prime (165372503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655 + ... + 18261.

It is an arithmetic number, because the mean of its divisors is an integer number (16740864).

Almost surely, 2^165372506 is an apocalyptic number.

165372506 is a deficient number, since it is larger than the sum of its proper divisors (102481318).

165372506 is a wasteful number, since it uses less digits than its factorization.

165372506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17005.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 165372506 is about 12859.7241805569. The cubic root of 165372506 is about 548.8930972126.

The spelling of 165372506 in words is "one hundred sixty-five million, three hundred seventy-two thousand, five hundred six".