165663212 has 48 divisors (see below), whose sum is σ = 341863200. Its totient is φ = 69250560.

The previous prime is 165663193. The next prime is 165663217. The reversal of 165663212 is 212366561.

It is not an unprimeable number, because it can be changed into a prime (165663217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290864 + ... + 291432.

It is an arithmetic number, because the mean of its divisors is an integer number (7122150).

Almost surely, 2^165663212 is an apocalyptic number.

It is an amenable number.

165663212 is an abundant number, since it is smaller than the sum of its proper divisors (176199988).

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

165663212 is a wasteful number, since it uses less digits than its factorization.

165663212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106 (or 1104 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 165663212 is about 12871.0221816296. The cubic root of 165663212 is about 549.2145394158.

The spelling of 165663212 in words is "one hundred sixty-five million, six hundred sixty-three thousand, two hundred twelve".