16668316793 has 2 divisors, whose sum is σ = 16668316794. Its totient is φ = 16668316792.

The previous prime is 16668316787. The next prime is 16668316817. The reversal of 16668316793 is 39761386661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13245247744 + 3423069049 = 115088^2 + 58507^2 .

It is a cyclic number.

It is not a de Polignac number, because 16668316793 - 2¹⁸ = 16668054649 is a prime.

It is not a weakly prime, because it can be changed into another prime (16668316703) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8334158396 + 8334158397.

It is an arithmetic number, because the mean of its divisors is an integer number (8334158397).

Almost surely, 2^16668316793 is an apocalyptic number.

It is an amenable number.

16668316793 is a deficient number, since it is larger than the sum of its proper divisors (1).

16668316793 is an equidigital number, since it uses as much as digits as its factorization.

16668316793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 56.

The spelling of 16668316793 in words is "sixteen billion, six hundred sixty-eight million, three hundred sixteen thousand, seven hundred ninety-three".