6679968749 has 2 divisors, whose sum is σ = 6679968750. Its totient is φ = 6679968748.

The previous prime is 6679968709. The next prime is 6679968751. The reversal of 6679968749 is 9478699766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5335279849 + 1344688900 = 73043^2 + 36670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6679968749 is a prime.

Together with 6679968751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6679968709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3339984374 + 3339984375.

It is an arithmetic number, because the mean of its divisors is an integer number (3339984375).

Almost surely, 2^6679968749 is an apocalyptic number.

It is an amenable number.

6679968749 is a deficient number, since it is larger than the sum of its proper divisors (1).

6679968749 is an equidigital number, since it uses as much as digits as its factorization.

6679968749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246903552, while the sum is 71.

The square root of 6679968749 is about 81731.0757851626. The cubic root of 6679968749 is about 1883.3229999973.

The spelling of 6679968749 in words is "six billion, six hundred seventy-nine million, nine hundred sixty-eight thousand, seven hundred forty-nine".