165499884 has 72 divisors (see below), whose sum is σ = 459098640. Its totient is φ = 49852800.

The previous prime is 165499877. The next prime is 165499889. The reversal of 165499884 is 488994561.

165499884 is a `hidden beast` number, since 1 + 6 + 549 + 98 + 8 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 165499884.

It is not an unprimeable number, because it can be changed into a prime (165499889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70522 + ... + 72830.

It is an arithmetic number, because the mean of its divisors is an integer number (6376370).

Almost surely, 2^165499884 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 165499884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229549320).

165499884 is an abundant number, since it is smaller than the sum of its proper divisors (293598756).

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

165499884 is a wasteful number, since it uses less digits than its factorization.

165499884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511 (or 2506 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 165499884 is about 12864.6758217998. The cubic root of 165499884 is about 549.0339891565.

The spelling of 165499884 in words is "one hundred sixty-five million, four hundred ninety-nine thousand, eight hundred eighty-four".