165999792 has 80 divisors (see below), whose sum is σ = 505935872. Its totient is φ = 45895680.

The previous prime is 165999773. The next prime is 165999811. The reversal of 165999792 is 297999561.

165999792 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (165999773) and next prime (165999811).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2448 + ... + 18384.

Almost surely, 2^165999792 is an apocalyptic number.

165999792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165999792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252967936).

165999792 is an abundant number, since it is smaller than the sum of its proper divisors (339936080).

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

165999792 is a wasteful number, since it uses less digits than its factorization.

165999792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15986 (or 15980 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 57.

The square root of 165999792 is about 12884.0906547571. The cubic root of 165999792 is about 549.5862364633.

The spelling of 165999792 in words is "one hundred sixty-five million, nine hundred ninety-nine thousand, seven hundred ninety-two".