165688899425279 has 8 divisors (see below), whose sum is σ = 166184083229472. Its totient is φ = 165194303379040.

The previous prime is 165688899425209. The next prime is 165688899425317. The reversal of 165688899425279 is 972524998886561.

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 165688899425279 - 2¹² = 165688899421183 is a prime.

It is a super-2 number, since 2×165688899425279² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165688899425194 and 165688899425203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165688899425209) 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, 146374844 + ... + 147502449.

It is an arithmetic number, because the mean of its divisors is an integer number (20773010403684).

Almost surely, 2^{165688899425279} is an apocalyptic number.

165688899425279 is a deficient number, since it is larger than the sum of its proper divisors (495183804193).

165688899425279 is a wasteful number, since it uses less digits than its factorization.

165688899425279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293878977.

The product of its digits is 37623398400, while the sum is 89.

The spelling of 165688899425279 in words is "one hundred sixty-five trillion, six hundred eighty-eight billion, eight hundred ninety-nine million, four hundred twenty-five thousand, two hundred seventy-nine".