165372065 has 16 divisors (see below), whose sum is σ = 210304080. Its totient is φ = 124615680.

The previous prime is 165372061. The next prime is 165372079. The reversal of 165372065 is 560273561.

It can be written as a sum of positive squares in 8 ways, for example, as 15358561 + 150013504 = 3919^2 + 12248^2 .

It is not a de Polignac number, because 165372065 - 2² = 165372061 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165372061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7964 + ... + 19853.

It is an arithmetic number, because the mean of its divisors is an integer number (13144005).

Almost surely, 2^165372065 is an apocalyptic number.

It is an amenable number.

165372065 is a deficient number, since it is larger than the sum of its proper divisors (44932015).

165372065 is a wasteful number, since it uses less digits than its factorization.

165372065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27892.

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

The square root of 165372065 is about 12859.7070339880. The cubic root of 165372065 is about 548.8926092999.

The spelling of 165372065 in words is "one hundred sixty-five million, three hundred seventy-two thousand, sixty-five".