6666868 has 24 divisors (see below), whose sum is σ = 13000680. Its totient is φ = 2970240.

The previous prime is 6666841. The next prime is 6666883. The reversal of 6666868 is 8686666.

It can be written as a sum of positive squares in 4 ways, for example, as 964324 + 5702544 = 982^2 + 2388^2 .

It is a congruent number.

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, 703 + ... + 3718.

It is an arithmetic number, because the mean of its divisors is an integer number (541695).

Almost surely, 2^6666868 is an apocalyptic number.

It is an amenable number.

6666868 is a deficient number, since it is larger than the sum of its proper divisors (6333812).

6666868 is a wasteful number, since it uses less digits than its factorization.

6666868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4467 (or 4465 counting only the distinct ones).

The product of its digits is 497664, while the sum is 46.

The square root of 6666868 is about 2582.0278852096. The cubic root of 6666868 is about 188.2091003763.

The spelling of 6666868 in words is "six million, six hundred sixty-six thousand, eight hundred sixty-eight".