6668018 has 12 divisors (see below), whose sum is σ = 11635182. Its totient is φ = 2857680.

The previous prime is 6667981. The next prime is 6668021. The reversal of 6668018 is 8108666.

It can be written as a sum of positive squares in only one way, i.e., 3869089 + 2798929 = 1967^2 + 1673^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33923 + ... + 34118.

Almost surely, 2^6668018 is an apocalyptic number.

6668018 is a deficient number, since it is larger than the sum of its proper divisors (4967164).

6668018 is a wasteful number, since it uses less digits than its factorization.

6668018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68057 (or 68050 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 6668018 is about 2582.2505687868. The cubic root of 6668018 is about 188.2199214506.

The spelling of 6668018 in words is "six million, six hundred sixty-eight thousand, eighteen".