2668640413 has 2 divisors, whose sum is σ = 2668640414. Its totient is φ = 2668640412.

The previous prime is 2668640411. The next prime is 2668640423. The reversal of 2668640413 is 3140468662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2544496249 + 124144164 = 50443^2 + 11142^2 .

It is a cyclic number.

It is not a de Polignac number, because 2668640413 - 2¹ = 2668640411 is a prime.

Together with 2668640411, 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 (2668640411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334320206 + 1334320207.

It is an arithmetic number, because the mean of its divisors is an integer number (1334320207).

Almost surely, 2^2668640413 is an apocalyptic number.

It is an amenable number.

2668640413 is a deficient number, since it is larger than the sum of its proper divisors (1).

2668640413 is an equidigital number, since it uses as much as digits as its factorization.

2668640413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 2668640413 is about 51658.8851312144. The cubic root of 2668640413 is about 1387.0645941445.

The spelling of 2668640413 in words is "two billion, six hundred sixty-eight million, six hundred forty thousand, four hundred thirteen".