6698869649 has 2 divisors, whose sum is σ = 6698869650. Its totient is φ = 6698869648.

The previous prime is 6698869633. The next prime is 6698869657. The reversal of 6698869649 is 9469688966.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3944719249 + 2754150400 = 62807^2 + 52480^2 .

It is a cyclic number.

It is not a de Polignac number, because 6698869649 - 2⁴ = 6698869633 is a prime.

It is not a weakly prime, because it can be changed into another prime (6698866649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3349434824 + 3349434825.

It is an arithmetic number, because the mean of its divisors is an integer number (3349434825).

Almost surely, 2^6698869649 is an apocalyptic number.

It is an amenable number.

6698869649 is a deficient number, since it is larger than the sum of its proper divisors (1).

6698869649 is an equidigital number, since it uses as much as digits as its factorization.

6698869649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241864704, while the sum is 71.

The square root of 6698869649 is about 81846.6227097979. The cubic root of 6698869649 is about 1885.0976080530.

The spelling of 6698869649 in words is "six billion, six hundred ninety-eight million, eight hundred sixty-nine thousand, six hundred forty-nine".