66570325317 has 6 divisors (see below), whose sum is σ = 96157136582. Its totient is φ = 44380216872.

The previous prime is 66570325303. The next prime is 66570325321. The reversal of 66570325317 is 71352307566.

66570325317 is a `hidden beast` number, since 6 + 6 + 5 + 7 + 0 + 325 + 317 = 666.

It can be written as a sum of positive squares in only one way, i.e., 65880002241 + 690323076 = 256671^2 + 26274^2 .

It is not a de Polignac number, because 66570325317 - 2¹⁶ = 66570259781 is a prime.

It is a super-2 number, since 2×66570325317² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66570365317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3698351398 + ... + 3698351415.

Almost surely, 2^66570325317 is an apocalyptic number.

It is an amenable number.

66570325317 is a deficient number, since it is larger than the sum of its proper divisors (29586811265).

66570325317 is a wasteful number, since it uses less digits than its factorization.

66570325317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7396702819 (or 7396702816 counting only the distinct ones).

The product of its (nonzero) digits is 793800, while the sum is 45.

The spelling of 66570325317 in words is "sixty-six billion, five hundred seventy million, three hundred twenty-five thousand, three hundred seventeen".