2668804398643 has 2 divisors, whose sum is σ = 2668804398644. Its totient is φ = 2668804398642.

The previous prime is 2668804398613. The next prime is 2668804398649. The reversal of 2668804398643 is 3468934088662.

2668804398643 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 is a cyclic number.

It is not a de Polignac number, because 2668804398643 - 2²¹ = 2668802301491 is a prime.

It is not a weakly prime, because it can be changed into another prime (2668804398649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334402199321 + 1334402199322.

It is an arithmetic number, because the mean of its divisors is an integer number (1334402199322).

Almost surely, 2^{2668804398643} is an apocalyptic number.

2668804398643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668804398643 is an equidigital number, since it uses as much as digits as its factorization.

2668804398643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 286654464, while the sum is 67.

The spelling of 2668804398643 in words is "two trillion, six hundred sixty-eight billion, eight hundred four million, three hundred ninety-eight thousand, six hundred forty-three".