165944 has 8 divisors (see below), whose sum is σ = 311160. Its totient is φ = 82968.

The previous prime is 165941. The next prime is 165947. The reversal of 165944 is 449561.

It is an interprime number because it is at equal distance from previous prime (165941) and next prime (165947).

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×165944² = 55074822272, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 165944.

It is not an unprimeable number, because it can be changed into a prime (165941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10364 + ... + 10379.

It is an arithmetic number, because the mean of its divisors is an integer number (38895).

2¹⁶⁵⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

165944 is a deficient number, since it is larger than the sum of its proper divisors (145216).

165944 is a wasteful number, since it uses less digits than its factorization.

165944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20749 (or 20745 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 165944 is about 407.3622466552. The cubic root of 165944 is about 54.9524658171.

The spelling of 165944 in words is "one hundred sixty-five thousand, nine hundred forty-four".