2668778263 has 2 divisors, whose sum is σ = 2668778264. Its totient is φ = 2668778262.

The previous prime is 2668778261. The next prime is 2668778279. The reversal of 2668778263 is 3628778662.

2668778263 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 not a de Polignac number, because 2668778263 - 2¹ = 2668778261 is a prime.

It is a super-2 number, since 2×2668778263² = 14244754834122594338, which contains 22 as substring.

Together with 2668778261, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2668778261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334389131 + 1334389132.

It is an arithmetic number, because the mean of its divisors is an integer number (1334389132).

Almost surely, 2^2668778263 is an apocalyptic number.

2668778263 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668778263 is an equidigital number, since it uses as much as digits as its factorization.

2668778263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8128512, while the sum is 55.

The square root of 2668778263 is about 51660.2193471921. The cubic root of 2668778263 is about 1387.0884769128.

The spelling of 2668778263 in words is "two billion, six hundred sixty-eight million, seven hundred seventy-eight thousand, two hundred sixty-three".