6668818 has 8 divisors (see below), whose sum is σ = 10772748. Its totient is φ = 3077904.

The previous prime is 6668807. The next prime is 6668821. The reversal of 6668818 is 8188666.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6640929 + 27889 = 2577^2 + 167^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128221 + ... + 128272.

Almost surely, 2^6668818 is an apocalyptic number.

6668818 is a deficient number, since it is larger than the sum of its proper divisors (4103930).

6668818 is a wasteful number, since it uses less digits than its factorization.

6668818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256508.

The product of its digits is 110592, while the sum is 43.

The square root of 6668818 is about 2582.4054677761. The cubic root of 6668818 is about 188.2274484207.

The spelling of 6668818 in words is "six million, six hundred sixty-eight thousand, eight hundred eighteen".