6696689971 has 2 divisors, whose sum is σ = 6696689972. Its totient is φ = 6696689970.

The previous prime is 6696689939. The next prime is 6696690067. The reversal of 6696689971 is 1799866966.

6696689971 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6696689971 - 2⁵ = 6696689939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6696689897 and 6696689906.

It is not a weakly prime, because it can be changed into another prime (6696689371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3348344985 + 3348344986.

It is an arithmetic number, because the mean of its divisors is an integer number (3348344986).

Almost surely, 2^6696689971 is an apocalyptic number.

6696689971 is a deficient number, since it is larger than the sum of its proper divisors (1).

6696689971 is an equidigital number, since it uses as much as digits as its factorization.

6696689971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52907904, while the sum is 67.

The square root of 6696689971 is about 81833.3060006743. The cubic root of 6696689971 is about 1884.8931282063.

The spelling of 6696689971 in words is "six billion, six hundred ninety-six million, six hundred eighty-nine thousand, nine hundred seventy-one".