2668804398613 has 2 divisors, whose sum is σ = 2668804398614. Its totient is φ = 2668804398612.

The previous prime is 2668804398599. The next prime is 2668804398643. The reversal of 2668804398613 is 3168934088662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2537591652324 + 131212746289 = 1592982^2 + 362233^2 .

It is a cyclic number.

It is not a de Polignac number, because 2668804398613 - 2¹⁷ = 2668804267541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2668804398643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334402199306 + 1334402199307.

It is an arithmetic number, because the mean of its divisors is an integer number (1334402199307).

Almost surely, 2^{2668804398613} is an apocalyptic number.

It is an amenable number.

2668804398613 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668804398613 is an equidigital number, since it uses as much as digits as its factorization.

2668804398613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71663616, while the sum is 64.

The spelling of 2668804398613 in words is "two trillion, six hundred sixty-eight billion, eight hundred four million, three hundred ninety-eight thousand, six hundred thirteen".