6668216 has 16 divisors (see below), whose sum is σ = 13238640. Its totient is φ = 3137920.

The previous prime is 6668213. The next prime is 6668237. The reversal of 6668216 is 6128666.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668213) 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, 24380 + ... + 24651.

It is an arithmetic number, because the mean of its divisors is an integer number (827415).

Almost surely, 2^6668216 is an apocalyptic number.

It is an amenable number.

6668216 is a deficient number, since it is larger than the sum of its proper divisors (6570424).

6668216 is a wasteful number, since it uses less digits than its factorization.

6668216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49054 (or 49050 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 6668216 is about 2582.2889071519. The cubic root of 6668216 is about 188.2217844318.

The spelling of 6668216 in words is "six million, six hundred sixty-eight thousand, two hundred sixteen".