6686994833 has 2 divisors, whose sum is σ = 6686994834. Its totient is φ = 6686994832.

The previous prime is 6686994823. The next prime is 6686994851. The reversal of 6686994833 is 3384996866.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6369157249 + 317837584 = 79807^2 + 17828^2 .

It is a cyclic number.

It is not a de Polignac number, because 6686994833 - 2³² = 2392027537 is a prime.

It is not a weakly prime, because it can be changed into another prime (6686994803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3343497416 + 3343497417.

It is an arithmetic number, because the mean of its divisors is an integer number (3343497417).

Almost surely, 2^6686994833 is an apocalyptic number.

It is an amenable number.

6686994833 is a deficient number, since it is larger than the sum of its proper divisors (1).

6686994833 is an equidigital number, since it uses as much as digits as its factorization.

6686994833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40310784, while the sum is 62.

The square root of 6686994833 is about 81774.0474294871. The cubic root of 6686994833 is about 1883.9830703992.

The spelling of 6686994833 in words is "six billion, six hundred eighty-six million, nine hundred ninety-four thousand, eight hundred thirty-three".