6694839643 has 2 divisors, whose sum is σ = 6694839644. Its totient is φ = 6694839642.

The previous prime is 6694839589. The next prime is 6694839713. The reversal of 6694839643 is 3469384966.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6694839643 - 2⁹ = 6694839131 is a prime.

It is not a weakly prime, because it can be changed into another prime (6694830643) 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, 3347419821 + 3347419822.

It is an arithmetic number, because the mean of its divisors is an integer number (3347419822).

Almost surely, 2^6694839643 is an apocalyptic number.

6694839643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6694839643 is an equidigital number, since it uses as much as digits as its factorization.

6694839643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20155392, while the sum is 58.

The square root of 6694839643 is about 81821.9997494561. Note that the first 3 decimals coincide. The cubic root of 6694839643 is about 1884.7195105028.

The spelling of 6694839643 in words is "six billion, six hundred ninety-four million, eight hundred thirty-nine thousand, six hundred forty-three".