6691359673 has 2 divisors, whose sum is σ = 6691359674. Its totient is φ = 6691359672.

The previous prime is 6691359659. The next prime is 6691359691. The reversal of 6691359673 is 3769531966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5954128569 + 737231104 = 77163^2 + 27152^2 .

It is a cyclic number.

It is not a de Polignac number, because 6691359673 - 2¹⁷ = 6691228601 is a prime.

It is not a weakly prime, because it can be changed into another prime (6691359643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3345679836 + 3345679837.

It is an arithmetic number, because the mean of its divisors is an integer number (3345679837).

Almost surely, 2^6691359673 is an apocalyptic number.

It is an amenable number.

6691359673 is a deficient number, since it is larger than the sum of its proper divisors (1).

6691359673 is an equidigital number, since it uses as much as digits as its factorization.

6691359673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 55.

The square root of 6691359673 is about 81800.7314942843. The cubic root of 6691359673 is about 1884.3928955552.

The spelling of 6691359673 in words is "six billion, six hundred ninety-one million, three hundred fifty-nine thousand, six hundred seventy-three".