165880986 has 32 divisors (see below), whose sum is σ = 346636800. Its totient is φ = 52852800.

The previous prime is 165880973. The next prime is 165881011. The reversal of 165880986 is 689088561.

165880986 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 12855 + ... + 22293.

It is an arithmetic number, because the mean of its divisors is an integer number (10832400).

Almost surely, 2^165880986 is an apocalyptic number.

165880986 is an abundant number, since it is smaller than the sum of its proper divisors (180755814).

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

165880986 is a wasteful number, since it uses less digits than its factorization.

165880986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9574.

The product of its (nonzero) digits is 829440, while the sum is 51.

The square root of 165880986 is about 12879.4792596595. The cubic root of 165880986 is about 549.4550922716.

The spelling of 165880986 in words is "one hundred sixty-five million, eight hundred eighty thousand, nine hundred eighty-six".