66172675317 has 16 divisors (see below), whose sum is σ = 100965701760. Its totient is φ = 37763776512.

The previous prime is 66172675307. The next prime is 66172675337. The reversal of 66172675317 is 71357627166.

It is not a de Polignac number, because 66172675317 - 2³¹ = 64025191669 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66172675317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66172675307) 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, 2032668 + ... + 2064965.

It is an arithmetic number, because the mean of its divisors is an integer number (6310356360).

Almost surely, 2^66172675317 is an apocalyptic number.

It is an amenable number.

66172675317 is a deficient number, since it is larger than the sum of its proper divisors (34793026443).

66172675317 is a wasteful number, since it uses less digits than its factorization.

66172675317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4098412.

The product of its digits is 2222640, while the sum is 51.

The spelling of 66172675317 in words is "sixty-six billion, one hundred seventy-two million, six hundred seventy-five thousand, three hundred seventeen".