6666769392917 has 2 divisors, whose sum is σ = 6666769392918. Its totient is φ = 6666769392916.

The previous prime is 6666769392817. The next prime is 6666769392937. The reversal of 6666769392917 is 7192939676666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6636116036356 + 30653356561 = 2576066^2 + 175081^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666769392917 - 2²⁴ = 6666752615701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666769392937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3333384696458 + 3333384696459.

It is an arithmetic number, because the mean of its divisors is an integer number (3333384696459).

Almost surely, 2^{6666769392917} is an apocalyptic number.

It is an amenable number.

6666769392917 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666769392917 is an equidigital number, since it uses as much as digits as its factorization.

6666769392917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1666598976, while the sum is 77.

The spelling of 6666769392917 in words is "six trillion, six hundred sixty-six billion, seven hundred sixty-nine million, three hundred ninety-two thousand, nine hundred seventeen".