165958912 has 72 divisors (see below), whose sum is σ = 388981376. Its totient is φ = 69175296.

The previous prime is 165958889. The next prime is 165958921. The reversal of 165958912 is 219859561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65053 + ... + 67555.

Almost surely, 2^165958912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165958912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194490688).

165958912 is an abundant number, since it is smaller than the sum of its proper divisors (223022464).

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

165958912 is an equidigital number, since it uses as much as digits as its factorization.

165958912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563 (or 2549 counting only the distinct ones).

The product of its digits is 194400, while the sum is 46.

The square root of 165958912 is about 12882.5041044045. The cubic root of 165958912 is about 549.5411180736.

The spelling of 165958912 in words is "one hundred sixty-five million, nine hundred fifty-eight thousand, nine hundred twelve".