8661668 has 12 divisors (see below), whose sum is σ = 15260700. Its totient is φ = 4301472.

The previous prime is 8661643. The next prime is 8661673.

8661668 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 2795584 + 5866084 = 1672^2 + 2422^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6671 + ... + 7862.

It is an arithmetic number, because the mean of its divisors is an integer number (1271725).

Almost surely, 2^8661668 is an apocalyptic number.

It is an amenable number.

8661668 is a deficient number, since it is larger than the sum of its proper divisors (6599032).

8661668 is a wasteful number, since it uses less digits than its factorization.

8661668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14686 (or 14684 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 8661668 is about 2943.0711850039. The cubic root of 8661668 is about 205.3685063245.

The spelling of 8661668 in words is "eight million, six hundred sixty-one thousand, six hundred sixty-eight".