6691000873 has 2 divisors, whose sum is σ = 6691000874. Its totient is φ = 6691000872.

The previous prime is 6691000867. The next prime is 6691000891. The reversal of 6691000873 is 3780001966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4251431209 + 2439569664 = 65203^2 + 49392^2 .

It is a cyclic number.

It is not a de Polignac number, because 6691000873 - 2⁹ = 6691000361 is a prime.

It is not a weakly prime, because it can be changed into another prime (6691000273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345500436 + 3345500437.

It is an arithmetic number, because the mean of its divisors is an integer number (3345500437).

Almost surely, 2^6691000873 is an apocalyptic number.

It is an amenable number.

6691000873 is a deficient number, since it is larger than the sum of its proper divisors (1).

6691000873 is an equidigital number, since it uses as much as digits as its factorization.

6691000873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 6691000873 is about 81798.5383304616. The cubic root of 6691000873 is about 1884.3592136984.

The spelling of 6691000873 in words is "six billion, six hundred ninety-one million, eight hundred seventy-three", and thus it is an aban number.