6668351279 has 2 divisors, whose sum is σ = 6668351280. Its totient is φ = 6668351278.

The previous prime is 6668351273. The next prime is 6668351323. The reversal of 6668351279 is 9721538666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6668351279 - 2¹² = 6668347183 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6668351279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6668351273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334175639 + 3334175640.

It is an arithmetic number, because the mean of its divisors is an integer number (3334175640).

Almost surely, 2^6668351279 is an apocalyptic number.

6668351279 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668351279 is an equidigital number, since it uses as much as digits as its factorization.

6668351279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 53.

The square root of 6668351279 is about 81659.9735427339. The cubic root of 6668351279 is about 1882.2305725010.

The spelling of 6668351279 in words is "six billion, six hundred sixty-eight million, three hundred fifty-one thousand, two hundred seventy-nine".