165068720 has 20 divisors (see below), whose sum is σ = 383784960. Its totient is φ = 66027456.

The previous prime is 165068711. The next prime is 165068731. The reversal of 165068720 is 27860561.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1031600 + ... + 1031759.

It is an arithmetic number, because the mean of its divisors is an integer number (19189248).

Almost surely, 2^165068720 is an apocalyptic number.

165068720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165068720 is an abundant number, since it is smaller than the sum of its proper divisors (218716240).

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

165068720 is a wasteful number, since it uses less digits than its factorization.

165068720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063372 (or 2063366 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 165068720 is about 12847.9072225791. The cubic root of 165068720 is about 548.5567893022.

The spelling of 165068720 in words is "one hundred sixty-five million, sixty-eight thousand, seven hundred twenty".