2668637843 has 2 divisors, whose sum is σ = 2668637844. Its totient is φ = 2668637842.

The previous prime is 2668637831. The next prime is 2668637861. The reversal of 2668637843 is 3487368662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2668637843 - 2⁶ = 2668637779 is a prime.

It is not a weakly prime, because it can be changed into another prime (2668637443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334318921 + 1334318922.

It is an arithmetic number, because the mean of its divisors is an integer number (1334318922).

Almost surely, 2^2668637843 is an apocalyptic number.

2668637843 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668637843 is an equidigital number, since it uses as much as digits as its factorization.

2668637843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 53.

The square root of 2668637843 is about 51658.8602564942. The cubic root of 2668637843 is about 1387.0641488794.

The spelling of 2668637843 in words is "two billion, six hundred sixty-eight million, six hundred thirty-seven thousand, eight hundred forty-three".