165775 has 12 divisors (see below), whose sum is σ = 217000. Its totient is φ = 125280.

The previous prime is 165749. The next prime is 165779. The reversal of 165775 is 577561.

It is not a de Polignac number, because 165775 - 2¹⁷ = 34703 is a prime.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165779) 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, 301 + ... + 649.

2¹⁶⁵⁷⁷⁵ is an apocalyptic number.

165775 is a deficient number, since it is larger than the sum of its proper divisors (51225).

165775 is a wasteful number, since it uses less digits than its factorization.

165775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 373 counting only the distinct ones).

The product of its digits is 7350, while the sum is 31.

The square root of 165775 is about 407.1547617307. The cubic root of 165775 is about 54.9338046600.

The spelling of 165775 in words is "one hundred sixty-five thousand, seven hundred seventy-five".