664368382737331 has 2 divisors, whose sum is σ = 664368382737332. Its totient is φ = 664368382737330.

The previous prime is 664368382737313. The next prime is 664368382737341. The reversal of 664368382737331 is 133737283863466.

Together with previous prime (664368382737313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664368382737331 - 2²¹ = 664368380640179 is a prime.

It is a super-2 number, since 2×664368382737331² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (664368382737341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332184191368665 + 332184191368666.

It is an arithmetic number, because the mean of its divisors is an integer number (332184191368666).

Almost surely, 2^{664368382737331} is an apocalyptic number.

664368382737331 is a deficient number, since it is larger than the sum of its proper divisors (1).

664368382737331 is an equidigital number, since it uses as much as digits as its factorization.

664368382737331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1316818944, while the sum is 70.

The spelling of 664368382737331 in words is "six hundred sixty-four trillion, three hundred sixty-eight billion, three hundred eighty-two million, seven hundred thirty-seven thousand, three hundred thirty-one".