6688859 has 2 divisors, whose sum is σ = 6688860. Its totient is φ = 6688858.

The previous prime is 6688853. The next prime is 6688907. The reversal of 6688859 is 9588866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6688859 - 2⁸ = 6688603 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6688853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344429 + 3344430.

It is an arithmetic number, because the mean of its divisors is an integer number (3344430).

Almost surely, 2^6688859 is an apocalyptic number.

6688859 is a deficient number, since it is larger than the sum of its proper divisors (1).

6688859 is an equidigital number, since it uses as much as digits as its factorization.

6688859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 50.

The square root of 6688859 is about 2586.2828538271. The cubic root of 6688859 is about 188.4158123262.

The spelling of 6688859 in words is "six million, six hundred eighty-eight thousand, eight hundred fifty-nine".