6689886899 has 2 divisors, whose sum is σ = 6689886900. Its totient is φ = 6689886898.

The previous prime is 6689886887. The next prime is 6689886943. The reversal of 6689886899 is 9986889866.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6689886899 - 2¹² = 6689882803 is a prime.

6689886899 is a strobogrammatic number because it is the same when read upside-down.

It is not a weakly prime, because it can be changed into another prime (6689886499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3344943449 + 3344943450.

It is an arithmetic number, because the mean of its divisors is an integer number (3344943450).

Almost surely, 2^6689886899 is an apocalyptic number.

6689886899 is a deficient number, since it is larger than the sum of its proper divisors (1).

6689886899 is an equidigital number, since it uses as much as digits as its factorization.

6689886899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 644972544, while the sum is 77.

The square root of 6689886899 is about 81791.7287933199. The cubic root of 6689886899 is about 1884.2546332470.

The spelling of 6689886899 in words is "six billion, six hundred eighty-nine million, eight hundred eighty-six thousand, eight hundred ninety-nine".