66570365317 has 2 divisors, whose sum is σ = 66570365318. Its totient is φ = 66570365316.

The previous prime is 66570365311. The next prime is 66570365339. The reversal of 66570365317 is 71356307566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65826112356 + 744252961 = 256566^2 + 27281^2 .

It is a cyclic number.

It is not a de Polignac number, because 66570365317 - 2³⁵ = 32210626949 is a prime.

It is a super-2 number, since 2×66570365317² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66570365311) 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 as a sum of consecutive naturals, namely, 33285182658 + 33285182659.

It is an arithmetic number, because the mean of its divisors is an integer number (33285182659).

Almost surely, 2^66570365317 is an apocalyptic number.

It is an amenable number.

66570365317 is a deficient number, since it is larger than the sum of its proper divisors (1).

66570365317 is an equidigital number, since it uses as much as digits as its factorization.

66570365317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2381400, while the sum is 49.

The spelling of 66570365317 in words is "sixty-six billion, five hundred seventy million, three hundred sixty-five thousand, three hundred seventeen".