165720960 has 96 divisors (see below), whose sum is σ = 572275080. Its totient is φ = 44190720.

The previous prime is 165720899. The next prime is 165720967. The reversal of 165720960 is 69027561.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165720967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8626 + ... + 20145.

Almost surely, 2^165720960 is an apocalyptic number.

165720960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165720960 is an abundant number, since it is smaller than the sum of its proper divisors (406554120).

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

165720960 is a wasteful number, since it uses less digits than its factorization.

165720960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28796 (or 28781 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 165720960 is about 12873.2653200344. The cubic root of 165720960 is about 549.2783483051.

The spelling of 165720960 in words is "one hundred sixty-five million, seven hundred twenty thousand, nine hundred sixty".