668682097439 has 2 divisors, whose sum is σ = 668682097440. Its totient is φ = 668682097438.

The previous prime is 668682097427. The next prime is 668682097441. The reversal of 668682097439 is 934790286866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 668682097439 - 2⁴ = 668682097423 is a prime.

Together with 668682097441, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668682897439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334341048719 + 334341048720.

It is an arithmetic number, because the mean of its divisors is an integer number (334341048720).

Almost surely, 2^668682097439 is an apocalyptic number.

668682097439 is a deficient number, since it is larger than the sum of its proper divisors (1).

668682097439 is an equidigital number, since it uses as much as digits as its factorization.

668682097439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 188116992, while the sum is 68.

The spelling of 668682097439 in words is "six hundred sixty-eight billion, six hundred eighty-two million, ninety-seven thousand, four hundred thirty-nine".