6668906 has 8 divisors (see below), whose sum is σ = 10326144. Its totient is φ = 3226860.

The previous prime is 6668903. The next prime is 6668911. The reversal of 6668906 is 6098666.

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

It is not an unprimeable number, because it can be changed into a prime (6668903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53720 + ... + 53843.

It is an arithmetic number, because the mean of its divisors is an integer number (1290768).

Almost surely, 2^6668906 is an apocalyptic number.

6668906 is a deficient number, since it is larger than the sum of its proper divisors (3657238).

6668906 is a wasteful number, since it uses less digits than its factorization.

6668906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107596.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 6668906 is about 2582.4225060977. The cubic root of 6668906 is about 188.2282763507.

The spelling of 6668906 in words is "six million, six hundred sixty-eight thousand, nine hundred six".