165099664 has 40 divisors (see below), whose sum is σ = 343103040. Its totient is φ = 76722048.

The previous prime is 165099629. The next prime is 165099679. The reversal of 165099664 is 466990561.

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 7 ways as a sum of consecutive naturals, for example, 10989 + ... + 21235.

It is an arithmetic number, because the mean of its divisors is an integer number (8577576).

Almost surely, 2^165099664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165099664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171551520).

165099664 is an abundant number, since it is smaller than the sum of its proper divisors (178003376).

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

165099664 is a wasteful number, since it uses less digits than its factorization.

165099664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10327 (or 10321 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 165099664 is about 12849.1114089652. Note that the first 3 decimals coincide. The cubic root of 165099664 is about 548.5910648870.

The spelling of 165099664 in words is "one hundred sixty-five million, ninety-nine thousand, six hundred sixty-four".