165533956 has 27 divisors (see below), whose sum is σ = 337346919. Its totient is φ = 70865928.

The previous prime is 165533941. The next prime is 165533969. The reversal of 165533956 is 659335561.

The square root of 165533956 is 12866.

It is a perfect power (a square), and thus also a powerful number.

165533956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 179665 + ... + 180583.

Almost surely, 2^165533956 is an apocalyptic number.

165533956 is the 12866-th square number.

It is an amenable number.

165533956 is an abundant number, since it is smaller than the sum of its proper divisors (171812963).

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

165533956 is an frugal number, since it uses more digits than its factorization.

165533956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1856 (or 928 counting only the distinct ones).

The product of its digits is 364500, while the sum is 43.

The cubic root of 165533956 is about 549.0716637095.

The spelling of 165533956 in words is "one hundred sixty-five million, five hundred thirty-three thousand, nine hundred fifty-six".