165099912 has 16 divisors (see below), whose sum is σ = 412749840. Its totient is φ = 55033296.

The previous prime is 165099899. The next prime is 165099943. The reversal of 165099912 is 219990561.

It is a happy number.

165099912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3439558 + ... + 3439605.

It is an arithmetic number, because the mean of its divisors is an integer number (25796865).

Almost surely, 2^165099912 is an apocalyptic number.

165099912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165099912 is an abundant number, since it is smaller than the sum of its proper divisors (247649928).

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

165099912 is a wasteful number, since it uses less digits than its factorization.

165099912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6879172 (or 6879168 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 42.

The square root of 165099912 is about 12849.1210594344. The cubic root of 165099912 is about 548.5913395706.

The spelling of 165099912 in words is "one hundred sixty-five million, ninety-nine thousand, nine hundred twelve".