165189975 has 12 divisors (see below), whose sum is σ = 273114216. Its totient is φ = 88101280.

The previous prime is 165189967. The next prime is 165189977. The reversal of 165189975 is 579981561.

It is not a de Polignac number, because 165189975 - 2³ = 165189967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165189977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1101192 + ... + 1101341.

It is an arithmetic number, because the mean of its divisors is an integer number (22759518).

Almost surely, 2^165189975 is an apocalyptic number.

165189975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165189975 is a deficient number, since it is larger than the sum of its proper divisors (107924241).

165189975 is a wasteful number, since it uses less digits than its factorization.

165189975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202546 (or 2202541 counting only the distinct ones).

The product of its digits is 680400, while the sum is 51.

The square root of 165189975 is about 12852.6252182190. The cubic root of 165189975 is about 548.6910747347.

The spelling of 165189975 in words is "one hundred sixty-five million, one hundred eighty-nine thousand, nine hundred seventy-five".