6668759 has 2 divisors, whose sum is σ = 6668760. Its totient is φ = 6668758.

The previous prime is 6668747. The next prime is 6668789. The reversal of 6668759 is 9578666.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6668759 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6668719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334379 + 3334380.

It is an arithmetic number, because the mean of its divisors is an integer number (3334380).

Almost surely, 2^6668759 is an apocalyptic number.

6668759 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668759 is an equidigital number, since it uses as much as digits as its factorization.

6668759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 6668759 is about 2582.3940442930. The cubic root of 6668759 is about 188.2268933272.

The spelling of 6668759 in words is "six million, six hundred sixty-eight thousand, seven hundred fifty-nine".