6688713349 has 2 divisors, whose sum is σ = 6688713350. Its totient is φ = 6688713348.

The previous prime is 6688713341. The next prime is 6688713371. The reversal of 6688713349 is 9433178866.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4897900225 + 1790813124 = 69985^2 + 42318^2 .

It is a cyclic number.

It is not a de Polignac number, because 6688713349 - 2³ = 6688713341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6688713349.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6688713341) 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 as a sum of consecutive naturals, namely, 3344356674 + 3344356675.

It is an arithmetic number, because the mean of its divisors is an integer number (3344356675).

Almost surely, 2^6688713349 is an apocalyptic number.

It is an amenable number.

6688713349 is a deficient number, since it is larger than the sum of its proper divisors (1).

6688713349 is an equidigital number, since it uses as much as digits as its factorization.

6688713349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 55.

The square root of 6688713349 is about 81784.5544647643. The cubic root of 6688713349 is about 1884.1444472118.

It can be divided in two parts, 668871 and 3349, that added together give a triangular number (672220 = T₁₁₅₉).

The spelling of 6688713349 in words is "six billion, six hundred eighty-eight million, seven hundred thirteen thousand, three hundred forty-nine".