664466442331 has 2 divisors, whose sum is σ = 664466442332. Its totient is φ = 664466442330.

The previous prime is 664466442259. The next prime is 664466442349. The reversal of 664466442331 is 133244664466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 664466442331 - 2¹³ = 664466434139 is a prime.

It is a super-2 number, since 2×664466442331² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (664466442631) 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, 332233221165 + 332233221166.

It is an arithmetic number, because the mean of its divisors is an integer number (332233221166).

Almost surely, 2^664466442331 is an apocalyptic number.

664466442331 is a deficient number, since it is larger than the sum of its proper divisors (1).

664466442331 is an equidigital number, since it uses as much as digits as its factorization.

664466442331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5971968, while the sum is 49.

The spelling of 664466442331 in words is "six hundred sixty-four billion, four hundred sixty-six million, four hundred forty-two thousand, three hundred thirty-one".