165759797 has 24 divisors (see below), whose sum is σ = 198994752. Its totient is φ = 137592000.

The previous prime is 165759793. The next prime is 165759817. The reversal of 165759797 is 797957561.

165759797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 165759797 - 2² = 165759793 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165759791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 317897 + ... + 318417.

It is an arithmetic number, because the mean of its divisors is an integer number (8291448).

Almost surely, 2^165759797 is an apocalyptic number.

It is an amenable number.

165759797 is a deficient number, since it is larger than the sum of its proper divisors (33234955).

165759797 is a wasteful number, since it uses less digits than its factorization.

165759797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 722 counting only the distinct ones).

The product of its digits is 4167450, while the sum is 56.

The square root of 165759797 is about 12874.7736679135. The cubic root of 165759797 is about 549.3212530711.

The spelling of 165759797 in words is "one hundred sixty-five million, seven hundred fifty-nine thousand, seven hundred ninety-seven".