668050208417 has 2 divisors, whose sum is σ = 668050208418. Its totient is φ = 668050208416.

The previous prime is 668050208317. The next prime is 668050208461. The reversal of 668050208417 is 714802050866.

668050208417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 430383233296 + 237666975121 = 656036^2 + 487511^2 .

It is a cyclic number.

It is not a de Polignac number, because 668050208417 - 2¹⁸ = 668049946273 is a prime.

It is not a weakly prime, because it can be changed into another prime (668050208467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334025104208 + 334025104209.

It is an arithmetic number, because the mean of its divisors is an integer number (334025104209).

Almost surely, 2^668050208417 is an apocalyptic number.

It is an amenable number.

668050208417 is a deficient number, since it is larger than the sum of its proper divisors (1).

668050208417 is an equidigital number, since it uses as much as digits as its factorization.

668050208417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 668050208417 in words is "six hundred sixty-eight billion, fifty million, two hundred eight thousand, four hundred seventeen".