666319631239 has 2 divisors, whose sum is σ = 666319631240. Its totient is φ = 666319631238.

The previous prime is 666319631231. The next prime is 666319631249. The reversal of 666319631239 is 932136913666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666319631239 - 2³ = 666319631231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666319631239.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666319631231) 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, 333159815619 + 333159815620.

It is an arithmetic number, because the mean of its divisors is an integer number (333159815620).

Almost surely, 2^666319631239 is an apocalyptic number.

666319631239 is a deficient number, since it is larger than the sum of its proper divisors (1).

666319631239 is an equidigital number, since it uses as much as digits as its factorization.

666319631239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5668704, while the sum is 55.

The spelling of 666319631239 in words is "six hundred sixty-six billion, three hundred nineteen million, six hundred thirty-one thousand, two hundred thirty-nine".