668050208317 has 2 divisors, whose sum is σ = 668050208318. Its totient is φ = 668050208316.

The previous prime is 668050208311. The next prime is 668050208417. The reversal of 668050208317 is 713802050866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 648252029881 + 19798178436 = 805141^2 + 140706^2 .

It is a cyclic number.

It is not a de Polignac number, because 668050208317 - 2¹⁵ = 668050175549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668050208311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334025104158 + 334025104159.

It is an arithmetic number, because the mean of its divisors is an integer number (334025104159).

Almost surely, 2^668050208317 is an apocalyptic number.

It is an amenable number.

668050208317 is a deficient number, since it is larger than the sum of its proper divisors (1).

668050208317 is an equidigital number, since it uses as much as digits as its factorization.

668050208317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 668050208317 in words is "six hundred sixty-eight billion, fifty million, two hundred eight thousand, three hundred seventeen".