6668641079 has 2 divisors, whose sum is σ = 6668641080. Its totient is φ = 6668641078.

The previous prime is 6668641027. The next prime is 6668641117. The reversal of 6668641079 is 9701468666.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6668641079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6668641079.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6668641019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334320539 + 3334320540.

It is an arithmetic number, because the mean of its divisors is an integer number (3334320540).

Almost surely, 2^6668641079 is an apocalyptic number.

6668641079 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668641079 is an equidigital number, since it uses as much as digits as its factorization.

6668641079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 6668641079 is about 81661.7479545962. The cubic root of 6668641079 is about 1882.2578387370.

The spelling of 6668641079 in words is "six billion, six hundred sixty-eight million, six hundred forty-one thousand, seventy-nine".