165560320 has 120 divisors (see below), whose sum is σ = 415223424. Its totient is φ = 63307776.

The previous prime is 165560309. The next prime is 165560323. The reversal of 165560320 is 23065561.

It is not an unprimeable number, because it can be changed into a prime (165560323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3522537 + ... + 3522583.

Almost surely, 2^165560320 is an apocalyptic number.

165560320 is a gapful number since it is divisible by the number (10) 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 165560320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207611712).

165560320 is an abundant number, since it is smaller than the sum of its proper divisors (249663104).

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

165560320 is an frugal number, since it uses more digits than its factorization.

165560320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 165560320 is about 12867.0245200668. The cubic root of 165560320 is about 549.1008117209.

The spelling of 165560320 in words is "one hundred sixty-five million, five hundred sixty thousand, three hundred twenty".