165660132 has 72 divisors (see below), whose sum is σ = 427455616. Its totient is φ = 49896000.

The previous prime is 165660119. The next prime is 165660163. The reversal of 165660132 is 231066561.

It is a self number, because there is not a number n which added to its sum of digits gives 165660132.

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 23 ways as a sum of consecutive naturals, for example, 393282 + ... + 393702.

Almost surely, 2^165660132 is an apocalyptic number.

165660132 is a gapful number since it is divisible by the number (12) 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 165660132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213727808).

165660132 is an abundant number, since it is smaller than the sum of its proper divisors (261795484).

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

165660132 is a wasteful number, since it uses less digits than its factorization.

165660132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 721 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 165660132 is about 12870.9025324567. The cubic root of 165660132 is about 549.2111357407.

The spelling of 165660132 in words is "one hundred sixty-five million, six hundred sixty thousand, one hundred thirty-two".