6698666 has 16 divisors (see below), whose sum is σ = 11171328. Its totient is φ = 2991600.

The previous prime is 6698651. The next prime is 6698677. The reversal of 6698666 is 6668966.

It is a self number, because there is not a number n which added to its sum of digits gives 6698666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3350 + ... + 4961.

It is an arithmetic number, because the mean of its divisors is an integer number (698208).

Almost surely, 2^6698666 is an apocalyptic number.

6698666 is a deficient number, since it is larger than the sum of its proper divisors (4472662).

6698666 is a wasteful number, since it uses less digits than its factorization.

6698666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8357.

The product of its digits is 559872, while the sum is 47.

The square root of 6698666 is about 2588.1781237001. The cubic root of 6698666 is about 188.5078505222.

The spelling of 6698666 in words is "six million, six hundred ninety-eight thousand, six hundred sixty-six".