It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-6698699 is a prime.
6698699 is a strobogrammatic number because it is the same when read upside-down.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 6698699.
Almost surely, 26698699 is an apocalyptic number.
6698699 is a wasteful number, since it uses less digits than its factorization.
6698699 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13189.
The square root of 6698699 is about 2588.1844988331. The cubic root of 6698699 is about 188.5081600738.
The spelling of 6698699 in words is "six million, six hundred ninety-eight thousand, six hundred ninety-nine".