664845182317 has 2 divisors, whose sum is σ = 664845182318. Its totient is φ = 664845182316.

The previous prime is 664845182303. The next prime is 664845182369. The reversal of 664845182317 is 713281548466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663498218916 + 1346963401 = 814554^2 + 36701^2 .

It is a cyclic number.

It is not a de Polignac number, because 664845182317 - 2⁷ = 664845182189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664845182387) 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, 332422591158 + 332422591159.

It is an arithmetic number, because the mean of its divisors is an integer number (332422591159).

Almost surely, 2^664845182317 is an apocalyptic number.

It is an amenable number.

664845182317 is a deficient number, since it is larger than the sum of its proper divisors (1).

664845182317 is an equidigital number, since it uses as much as digits as its factorization.

664845182317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 55.

The spelling of 664845182317 in words is "six hundred sixty-four billion, eight hundred forty-five million, one hundred eighty-two thousand, three hundred seventeen".