165165279 has 16 divisors (see below), whose sum is σ = 226283904. Its totient is φ = 107100000.

The previous prime is 165165257. The next prime is 165165283. The reversal of 165165279 is 972561561.

It is not a de Polignac number, because 165165279 - 2¹⁵ = 165132511 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165165279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165165779) 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, 29829 + ... + 34929.

It is an arithmetic number, because the mean of its divisors is an integer number (14142744).

Almost surely, 2^165165279 is an apocalyptic number.

165165279 is a deficient number, since it is larger than the sum of its proper divisors (61118625).

165165279 is a wasteful number, since it uses less digits than its factorization.

165165279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398.

The product of its digits is 113400, while the sum is 42.

The square root of 165165279 is about 12851.6644447324. The cubic root of 165165279 is about 548.6637301574.

The spelling of 165165279 in words is "one hundred sixty-five million, one hundred sixty-five thousand, two hundred seventy-nine".