6691000867 has 2 divisors, whose sum is σ = 6691000868. Its totient is φ = 6691000866.

The previous prime is 6691000831. The next prime is 6691000873. The reversal of 6691000867 is 7680001966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6691000867 - 2⁷ = 6691000739 is a prime.

It is not a weakly prime, because it can be changed into another prime (6691000567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345500433 + 3345500434.

It is an arithmetic number, because the mean of its divisors is an integer number (3345500434).

Almost surely, 2^6691000867 is an apocalyptic number.

6691000867 is a deficient number, since it is larger than the sum of its proper divisors (1).

6691000867 is an equidigital number, since it uses as much as digits as its factorization.

6691000867 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 6691000867 is about 81798.5382937862. The cubic root of 6691000867 is about 1884.3592131351.

The spelling of 6691000867 in words is "six billion, six hundred ninety-one million, eight hundred sixty-seven", and thus it is an aban number.