7776668313 has 6 divisors (see below), whose sum is σ = 11232965354. Its totient is φ = 5184445536.

The previous prime is 7776668227. The next prime is 7776668371. The reversal of 7776668313 is 3138666777.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 4554630144 + 3222038169 = 67488^2 + 56763^2 .

It is not a de Polignac number, because 7776668313 - 2¹⁴ = 7776651929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7776668313.

It is not an unprimeable number, because it can be changed into a prime (7776668413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 432037120 + ... + 432037137.

Almost surely, 2^7776668313 is an apocalyptic number.

It is an amenable number.

7776668313 is a deficient number, since it is larger than the sum of its proper divisors (3456297041).

7776668313 is a wasteful number, since it uses less digits than its factorization.

7776668313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864074263 (or 864074260 counting only the distinct ones).

The product of its digits is 5334336, while the sum is 54.

The square root of 7776668313 is about 88185.4200704402. The cubic root of 7776668313 is about 1981.2131049358.

The spelling of 7776668313 in words is "seven billion, seven hundred seventy-six million, six hundred sixty-eight thousand, three hundred thirteen".