6866668859 has 2 divisors, whose sum is σ = 6866668860. Its totient is φ = 6866668858.

The previous prime is 6866668847. The next prime is 6866668903. The reversal of 6866668859 is 9588666686.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6866668859 is a prime.

It is a super-2 number, since 2×6866668859² = 94302282438320723762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6866668819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3433334429 + 3433334430.

It is an arithmetic number, because the mean of its divisors is an integer number (3433334430).

Almost surely, 2^6866668859 is an apocalyptic number.

6866668859 is a deficient number, since it is larger than the sum of its proper divisors (1).

6866668859 is an equidigital number, since it uses as much as digits as its factorization.

6866668859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 179159040, while the sum is 68.

The square root of 6866668859 is about 82865.3658593263. The cubic root of 6866668859 is about 1900.7078488145.

The spelling of 6866668859 in words is "six billion, eight hundred sixty-six million, six hundred sixty-eight thousand, eight hundred fifty-nine".