165937869 has 16 divisors (see below), whose sum is σ = 246354240. Its totient is φ = 110391120.

The previous prime is 165937861. The next prime is 165937879. The reversal of 165937869 is 968739561.

It is not a de Polignac number, because 165937869 - 2³ = 165937861 is a prime.

It is a super-2 number, since 2×165937869² = 55070752736522322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165937861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6999 + ... + 19515.

It is an arithmetic number, because the mean of its divisors is an integer number (15397140).

Almost surely, 2^165937869 is an apocalyptic number.

It is an amenable number.

165937869 is a deficient number, since it is larger than the sum of its proper divisors (80416371).

165937869 is a wasteful number, since it uses less digits than its factorization.

165937869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13017 (or 13011 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 54.

The square root of 165937869 is about 12881.6873506540. The cubic root of 165937869 is about 549.5178904719.

The spelling of 165937869 in words is "one hundred sixty-five million, nine hundred thirty-seven thousand, eight hundred sixty-nine".