165918797 has 8 divisors (see below), whose sum is σ = 184070880. Its totient is φ = 148278160.

The previous prime is 165918787. The next prime is 165918799. The reversal of 165918797 is 797819561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165918797 - 2¹² = 165914701 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 (165918799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127178 + ... + 128475.

It is an arithmetic number, because the mean of its divisors is an integer number (23008860).

Almost surely, 2^165918797 is an apocalyptic number.

It is an amenable number.

165918797 is a deficient number, since it is larger than the sum of its proper divisors (18152083).

165918797 is a wasteful number, since it uses less digits than its factorization.

165918797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255723.

The product of its digits is 952560, while the sum is 53.

The square root of 165918797 is about 12880.9470536914. The cubic root of 165918797 is about 549.4968367951.

The spelling of 165918797 in words is "one hundred sixty-five million, nine hundred eighteen thousand, seven hundred ninety-seven".