165916 has 6 divisors (see below), whose sum is σ = 290360. Its totient is φ = 82956.

The previous prime is 165901. The next prime is 165931. The reversal of 165916 is 619561.

It is an interprime number because it is at equal distance from previous prime (165901) and next prime (165931).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20736 + ... + 20743.

2¹⁶⁵⁹¹⁶ is an apocalyptic number.

It is an amenable number.

165916 is a deficient number, since it is larger than the sum of its proper divisors (124444).

165916 is a wasteful number, since it uses less digits than its factorization.

165916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41483 (or 41481 counting only the distinct ones).

The product of its digits is 1620, while the sum is 28.

The square root of 165916 is about 407.3278777594. The cubic root of 165916 is about 54.9493749037.

It can be divided in two parts, 165 and 916, that added together give a triangular number (1081 = T₄₆).

The spelling of 165916 in words is "one hundred sixty-five thousand, nine hundred sixteen".