6626720313 has 24 divisors (see below), whose sum is σ = 10169632200. Its totient is φ = 4150185984.

The previous prime is 6626720297. The next prime is 6626720323. The reversal of 6626720313 is 3130276266.

6626720313 is a `hidden beast` number, since 6 + 626 + 7 + 20 + 3 + 1 + 3 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4661748729 + 1964971584 = 68277^2 + 44328^2 .

It is not a de Polignac number, because 6626720313 - 2⁴ = 6626720297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6626720323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333448 + ... + 352761.

It is an arithmetic number, because the mean of its divisors is an integer number (423734675).

Almost surely, 2^6626720313 is an apocalyptic number.

It is an amenable number.

6626720313 is a deficient number, since it is larger than the sum of its proper divisors (3542911887).

6626720313 is a wasteful number, since it uses less digits than its factorization.

6626720313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686281 (or 686278 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The square root of 6626720313 is about 81404.6700933061. The cubic root of 6626720313 is about 1878.3054287575.

Adding to 6626720313 its reverse (3130276266), we get a palindrome (9756996579).

The spelling of 6626720313 in words is "six billion, six hundred twenty-six million, seven hundred twenty thousand, three hundred thirteen".