165790972077 has 16 divisors (see below), whose sum is σ = 226191336192. Its totient is φ = 107967991040.

The previous prime is 165790972069. The next prime is 165790972093. The reversal of 165790972077 is 770279097561.

It is a cyclic number.

It is not a de Polignac number, because 165790972077 - 2³ = 165790972069 is a prime.

It is a super-3 number, since 3×165790972077³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 165790972077.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165790972037) 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, 1054968 + ... + 1201889.

It is an arithmetic number, because the mean of its divisors is an integer number (14136958512).

Almost surely, 2^165790972077 is an apocalyptic number.

It is an amenable number.

165790972077 is a deficient number, since it is larger than the sum of its proper divisors (60400364115).

165790972077 is a wasteful number, since it uses less digits than its factorization.

165790972077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257428.

The product of its (nonzero) digits is 11668860, while the sum is 60.

The spelling of 165790972077 in words is "one hundred sixty-five billion, seven hundred ninety million, nine hundred seventy-two thousand, seventy-seven".