165961612 has 6 divisors (see below), whose sum is σ = 290432828. Its totient is φ = 82980804.

The previous prime is 165961597. The next prime is 165961643. The reversal of 165961612 is 216169561.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20745198 + ... + 20745205.

Almost surely, 2^165961612 is an apocalyptic number.

It is an amenable number.

165961612 is a deficient number, since it is larger than the sum of its proper divisors (124471216).

165961612 is a wasteful number, since it uses less digits than its factorization.

165961612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41490407 (or 41490405 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 165961612 is about 12882.6088972692. The cubic root of 165961612 is about 549.5440982349.

The spelling of 165961612 in words is "one hundred sixty-five million, nine hundred sixty-one thousand, six hundred twelve".