6816666 has 8 divisors (see below), whose sum is σ = 13633344. Its totient is φ = 2272220.

The previous prime is 6816659. The next prime is 6816679. The reversal of 6816666 is 6666186.

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

6816666 is an admirable number.

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, 568050 + ... + 568061.

It is an arithmetic number, because the mean of its divisors is an integer number (1704168).

Almost surely, 2^6816666 is an apocalyptic number.

6816666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6816666 is a wasteful number, since it uses less digits than its factorization.

6816666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136116.

The product of its digits is 62208, while the sum is 39.

The square root of 6816666 is about 2610.8745661176. The cubic root of 6816666 is about 189.6082973634.

The spelling of 6816666 in words is "six million, eight hundred sixteen thousand, six hundred sixty-six".