2668820649413 has 4 divisors (see below), whose sum is σ = 2668833657228. Its totient is φ = 2668807641600.

The previous prime is 2668820649409. The next prime is 2668820649437. The reversal of 2668820649413 is 3149460288662.

It is a happy number.

2668820649413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1485809847844 + 1183010801569 = 1218938^2 + 1087663^2 .

It is a cyclic number.

It is not a de Polignac number, because 2668820649413 - 2² = 2668820649409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2668820642413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6191138 + ... + 6608163.

It is an arithmetic number, because the mean of its divisors is an integer number (667208414307).

Almost surely, 2^{2668820649413} is an apocalyptic number.

It is an amenable number.

2668820649413 is a deficient number, since it is larger than the sum of its proper divisors (13007815).

2668820649413 is a wasteful number, since it uses less digits than its factorization.

2668820649413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13007814.

The product of its (nonzero) digits is 23887872, while the sum is 59.

The spelling of 2668820649413 in words is "two trillion, six hundred sixty-eight billion, eight hundred twenty million, six hundred forty-nine thousand, four hundred thirteen".