165099816 has 192 divisors, whose sum is σ = 562248000. Its totient is φ = 44634240.

The previous prime is 165099791. The next prime is 165099817. The reversal of 165099816 is 618990561.

165099816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (165099817) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 200686 + ... + 201506.

It is an arithmetic number, because the mean of its divisors is an integer number (2928375).

Almost surely, 2^165099816 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 165099816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281124000).

165099816 is an abundant number, since it is smaller than the sum of its proper divisors (397148184).

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

165099816 is a wasteful number, since it uses less digits than its factorization.

165099816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 165099816 is about 12849.1173237698. The cubic root of 165099816 is about 548.5912332415.

The spelling of 165099816 in words is "one hundred sixty-five million, ninety-nine thousand, eight hundred sixteen".