664938835139 has 2 divisors, whose sum is σ = 664938835140. Its totient is φ = 664938835138.

The previous prime is 664938835111. The next prime is 664938835247. The reversal of 664938835139 is 931538839466.

664938835139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664938835139 - 2¹⁶ = 664938769603 is a prime.

It is a super-2 number, since 2×664938835139² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (664938835109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332469417569 + 332469417570.

It is an arithmetic number, because the mean of its divisors is an integer number (332469417570).

Almost surely, 2^664938835139 is an apocalyptic number.

664938835139 is a deficient number, since it is larger than the sum of its proper divisors (1).

664938835139 is an equidigital number, since it uses as much as digits as its factorization.

664938835139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100776960, while the sum is 65.

The spelling of 664938835139 in words is "six hundred sixty-four billion, nine hundred thirty-eight million, eight hundred thirty-five thousand, one hundred thirty-nine".