16668503703317 has 2 divisors, whose sum is σ = 16668503703318. Its totient is φ = 16668503703316.

The previous prime is 16668503703311. The next prime is 16668503703361. The reversal of 16668503703317 is 71330730586661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8970797726641 + 7697705976676 = 2995129^2 + 2774474^2 .

It is a cyclic number.

It is not a de Polignac number, because 16668503703317 - 2⁶ = 16668503703253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16668503703311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334251851658 + 8334251851659.

It is an arithmetic number, because the mean of its divisors is an integer number (8334251851659).

Almost surely, 2^{16668503703317} is an apocalyptic number.

It is an amenable number.

16668503703317 is a deficient number, since it is larger than the sum of its proper divisors (1).

16668503703317 is an equidigital number, since it uses as much as digits as its factorization.

16668503703317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11430720, while the sum is 56.

The spelling of 16668503703317 in words is "sixteen trillion, six hundred sixty-eight billion, five hundred three million, seven hundred three thousand, three hundred seventeen".