165470220 has 72 divisors (see below), whose sum is σ = 510466320. Its totient is φ = 43374720.

The previous prime is 165470213. The next prime is 165470233. The reversal of 165470220 is 22074561.

165470220 is a `hidden beast` number, since 1 + 654 + 7 + 0 + 2 + 2 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2830 + ... + 18410.

It is an arithmetic number, because the mean of its divisors is an integer number (7089810).

Almost surely, 2^165470220 is an apocalyptic number.

165470220 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 165470220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255233160).

165470220 is an abundant number, since it is smaller than the sum of its proper divisors (344996100).

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

165470220 is a wasteful number, since it uses less digits than its factorization.

165470220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15655 (or 15650 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 165470220 is about 12863.5228456283. The cubic root of 165470220 is about 549.0011844660.

The spelling of 165470220 in words is "one hundred sixty-five million, four hundred seventy thousand, two hundred twenty".