2668698191 has 2 divisors, whose sum is σ = 2668698192. Its totient is φ = 2668698190.

The previous prime is 2668698169. The next prime is 2668698217. The reversal of 2668698191 is 1918968662.

It is a happy number.

2668698191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2668698191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2668698161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334349095 + 1334349096.

It is an arithmetic number, because the mean of its divisors is an integer number (1334349096).

Almost surely, 2^2668698191 is an apocalyptic number.

2668698191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668698191 is an equidigital number, since it uses as much as digits as its factorization.

2668698191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 56.

The square root of 2668698191 is about 51659.4443543482. Note that the first 3 decimals coincide. The cubic root of 2668698191 is about 1387.0746043903.

The spelling of 2668698191 in words is "two billion, six hundred sixty-eight million, six hundred ninety-eight thousand, one hundred ninety-one".