6699899 has 4 divisors (see below), whose sum is σ = 6930960. Its totient is φ = 6468840.

The previous prime is 6699893. The next prime is 6699907. The reversal of 6699899 is 9989966.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6699899 - 2⁸ = 6699643 is a prime.

It is a super-2 number, since 2×6699899² = 89777293220402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6699893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115487 + ... + 115544.

It is an arithmetic number, because the mean of its divisors is an integer number (1732740).

Almost surely, 2^6699899 is an apocalyptic number.

6699899 is a deficient number, since it is larger than the sum of its proper divisors (231061).

6699899 is a wasteful number, since it uses less digits than its factorization.

6699899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231060.

The product of its digits is 1889568, while the sum is 56.

The square root of 6699899 is about 2588.4163111833. The cubic root of 6699899 is about 188.5194158060.

The spelling of 6699899 in words is "six million, six hundred ninety-nine thousand, eight hundred ninety-nine".