6693994899 has 16 divisors (see below), whose sum is σ = 10438979200. Its totient is φ = 4227785928.

The previous prime is 6693994859. The next prime is 6693994913. The reversal of 6693994899 is 9984993966.

It is a happy number.

It is not a de Polignac number, because 6693994899 - 2¹⁵ = 6693962131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6693994859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6523849 + ... + 6524874.

It is an arithmetic number, because the mean of its divisors is an integer number (652436200).

Almost surely, 2^6693994899 is an apocalyptic number.

6693994899 is a deficient number, since it is larger than the sum of its proper divisors (3744984301).

6693994899 is a wasteful number, since it uses less digits than its factorization.

6693994899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13048751 (or 13048745 counting only the distinct ones).

The product of its digits is 204073344, while the sum is 72.

The square root of 6693994899 is about 81816.8375030470. The cubic root of 6693994899 is about 1884.6402368855.

The spelling of 6693994899 in words is "six billion, six hundred ninety-three million, nine hundred ninety-four thousand, eight hundred ninety-nine".