6668066 has 16 divisors (see below), whose sum is σ = 10342080. Its totient is φ = 3222000.

The previous prime is 6668059. The next prime is 6668083. The reversal of 6668066 is 6608666.

6668066 = 21² + 22² + ... + 271².

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18395 + ... + 18753.

It is an arithmetic number, because the mean of its divisors is an integer number (646380).

Almost surely, 2^6668066 is an apocalyptic number.

6668066 is a deficient number, since it is larger than the sum of its proper divisors (3674014).

6668066 is a wasteful number, since it uses less digits than its factorization.

6668066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 6668066 is about 2582.2598629882. The cubic root of 6668066 is about 188.2203730858.

The spelling of 6668066 in words is "six million, six hundred sixty-eight thousand, sixty-six".