165402879 has 8 divisors (see below), whose sum is σ = 221453232. Its totient is φ = 109810560.

The previous prime is 165402871. The next prime is 165402883. The reversal of 165402879 is 978204561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165402879 - 2³ = 165402871 is a prime.

It is a super-2 number, since 2×165402879² = 54716224762977282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165402879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165402871) 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, 113664 + ... + 115109.

It is an arithmetic number, because the mean of its divisors is an integer number (27681654).

Almost surely, 2^165402879 is an apocalyptic number.

165402879 is a deficient number, since it is larger than the sum of its proper divisors (56050353).

165402879 is a wasteful number, since it uses less digits than its factorization.

165402879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229017.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 165402879 is about 12860.9050614644. The cubic root of 165402879 is about 548.9266991495.

The spelling of 165402879 in words is "one hundred sixty-five million, four hundred two thousand, eight hundred seventy-nine".