664798532413 has 2 divisors, whose sum is σ = 664798532414. Its totient is φ = 664798532412.

The previous prime is 664798532369. The next prime is 664798532501. The reversal of 664798532413 is 314235897466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543107093764 + 121691438649 = 736958^2 + 348843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664798532413 is a prime.

It is a super-2 number, since 2×664798532413² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664798538413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332399266206 + 332399266207.

It is an arithmetic number, because the mean of its divisors is an integer number (332399266207).

Almost surely, 2^664798532413 is an apocalyptic number.

It is an amenable number.

664798532413 is a deficient number, since it is larger than the sum of its proper divisors (1).

664798532413 is an equidigital number, since it uses as much as digits as its factorization.

664798532413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26127360, while the sum is 58.

The spelling of 664798532413 in words is "six hundred sixty-four billion, seven hundred ninety-eight million, five hundred thirty-two thousand, four hundred thirteen".