165975633 has 12 divisors (see below), whose sum is σ = 242215428. Its totient is φ = 109509120.

The previous prime is 165975631. The next prime is 165975679. The reversal of 165975633 is 336579561.

165975633 is a `hidden beast` number, since 1 + 6 + 5 + 9 + 7 + 5 + 633 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 137170944 + 28804689 = 11712^2 + 5367^2 .

It is not a de Polignac number, because 165975633 - 2¹ = 165975631 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165975631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94188 + ... + 95933.

It is an arithmetic number, because the mean of its divisors is an integer number (20184619).

Almost surely, 2^165975633 is an apocalyptic number.

It is an amenable number.

165975633 is a deficient number, since it is larger than the sum of its proper divisors (76239795).

165975633 is a wasteful number, since it uses less digits than its factorization.

165975633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190224 (or 190221 counting only the distinct ones).

The product of its digits is 510300, while the sum is 45.

The square root of 165975633 is about 12883.1530690278. The cubic root of 165975633 is about 549.5595735823.

The spelling of 165975633 in words is "one hundred sixty-five million, nine hundred seventy-five thousand, six hundred thirty-three".