165812994 has 24 divisors (see below), whose sum is σ = 372568560. Its totient is φ = 55270836.

The previous prime is 165812987. The next prime is 165813023. The reversal of 165812994 is 499218561.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 170104 + ... + 171075.

It is an arithmetic number, because the mean of its divisors is an integer number (15523690).

Almost surely, 2^165812994 is an apocalyptic number.

165812994 is an abundant number, since it is smaller than the sum of its proper divisors (206755566).

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

165812994 is an equidigital number, since it uses as much as digits as its factorization.

165812994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341196 (or 341184 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 165812994 is about 12876.8394414157. The cubic root of 165812994 is about 549.3800110202.

It can be divided in two parts, 165 and 812994, that multiplied together give a triangular number (134144010 = T₁₆₃₇₉).

The spelling of 165812994 in words is "one hundred sixty-five million, eight hundred twelve thousand, nine hundred ninety-four".