165404165 has 16 divisors (see below), whose sum is σ = 202106880. Its totient is φ = 129931200.

The previous prime is 165404147. The next prime is 165404167. The reversal of 165404165 is 561404561.

It is not a de Polignac number, because 165404165 - 2¹⁶ = 165338629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165404167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62846 + ... + 65424.

It is an arithmetic number, because the mean of its divisors is an integer number (12631680).

Almost surely, 2^165404165 is an apocalyptic number.

It is an amenable number.

165404165 is a deficient number, since it is larger than the sum of its proper divisors (36702715).

165404165 is a wasteful number, since it uses less digits than its factorization.

165404165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 165404165 is about 12860.9550578485. The cubic root of 165404165 is about 548.9281217726.

The spelling of 165404165 in words is "one hundred sixty-five million, four hundred four thousand, one hundred sixty-five".