6668428 has 12 divisors (see below), whose sum is σ = 12567520. Its totient is φ = 3077712.

The previous prime is 6668423. The next prime is 6668429. The reversal of 6668428 is 8248666.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6668423) 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, 64068 + ... + 64171.

Almost surely, 2^6668428 is an apocalyptic number.

It is an amenable number.

6668428 is a deficient number, since it is larger than the sum of its proper divisors (5899092).

6668428 is a wasteful number, since it uses less digits than its factorization.

6668428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128256 (or 128254 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 6668428 is about 2582.3299556796. The cubic root of 6668428 is about 188.2237790980.

The spelling of 6668428 in words is "six million, six hundred sixty-eight thousand, four hundred twenty-eight".