165980730 has 16 divisors (see below), whose sum is σ = 398353824. Its totient is φ = 44261520.

The previous prime is 165980699. The next prime is 165980743. The reversal of 165980730 is 37089561.

165980730 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 7 ways as a sum of consecutive naturals, for example, 2766316 + ... + 2766375.

It is an arithmetic number, because the mean of its divisors is an integer number (24897114).

Almost surely, 2^165980730 is an apocalyptic number.

165980730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165980730 is an abundant number, since it is smaller than the sum of its proper divisors (232373094).

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

165980730 is a wasteful number, since it uses less digits than its factorization.

165980730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5532701.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 165980730 is about 12883.3508839898. The cubic root of 165980730 is about 549.5651990597.

The spelling of 165980730 in words is "one hundred sixty-five million, nine hundred eighty thousand, seven hundred thirty".