6990668 has 12 divisors (see below), whose sum is σ = 12252240. Its totient is φ = 3490032.

The previous prime is 6990667. The next prime is 6990673. The reversal of 6990668 is 8660996.

It is not an unprimeable number, because it can be changed into a prime (6990667) 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, 4178 + ... + 5606.

It is an arithmetic number, because the mean of its divisors is an integer number (1021020).

Almost surely, 2^6990668 is an apocalyptic number.

It is an amenable number.

6990668 is a deficient number, since it is larger than the sum of its proper divisors (5261572).

6990668 is a wasteful number, since it uses less digits than its factorization.

6990668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656 (or 2654 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 6990668 is about 2643.9871406646. The cubic root of 6990668 is about 191.2080734557.

The spelling of 6990668 in words is "six million, nine hundred ninety thousand, six hundred sixty-eight".