165022506 has 48 divisors (see below), whose sum is σ = 391659840. Its totient is φ = 49800960.

The previous prime is 165022471. The next prime is 165022513. The reversal of 165022506 is 605220561.

165022506 is a `hidden beast` number, since 1 + 650 + 2 + 2 + 5 + 0 + 6 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165022506.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 50490 + ... + 53658.

It is an arithmetic number, because the mean of its divisors is an integer number (8159580).

Almost surely, 2^165022506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165022506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195829920).

165022506 is an abundant number, since it is smaller than the sum of its proper divisors (226637334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165022506 is a wasteful number, since it uses less digits than its factorization.

165022506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3451 (or 3448 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 165022506 is about 12846.1085936559. The cubic root of 165022506 is about 548.5055916966.

The spelling of 165022506 in words is "one hundred sixty-five million, twenty-two thousand, five hundred six".