165693165 has 24 divisors (see below), whose sum is σ = 291404064. Its totient is φ = 80335200.

The previous prime is 165693163. The next prime is 165693193. The reversal of 165693165 is 561396561.

165693165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165693165 - 2¹ = 165693163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165693161) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43831 + ... + 47460.

It is an arithmetic number, because the mean of its divisors is an integer number (12141836).

Almost surely, 2^165693165 is an apocalyptic number.

165693165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165693165 is a deficient number, since it is larger than the sum of its proper divisors (125710899).

165693165 is a wasteful number, since it uses less digits than its factorization.

165693165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91321 (or 91310 counting only the distinct ones).

The product of its digits is 145800, while the sum is 42.

The square root of 165693165 is about 12872.1857118362. The cubic root of 165693165 is about 549.2476379566.

The spelling of 165693165 in words is "one hundred sixty-five million, six hundred ninety-three thousand, one hundred sixty-five".