8663666 has 16 divisors (see below), whose sum is σ = 14256000. Its totient is φ = 3916080.

The previous prime is 8663653. The next prime is 8663687. The reversal of 8663666 is 6663668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3335 + ... + 5333.

It is an arithmetic number, because the mean of its divisors is an integer number (891000).

Almost surely, 2^8663666 is an apocalyptic number.

8663666 is a deficient number, since it is larger than the sum of its proper divisors (5592334).

8663666 is a wasteful number, since it uses less digits than its factorization.

8663666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209.

The product of its digits is 186624, while the sum is 41.

The square root of 8663666 is about 2943.4106067622. The cubic root of 8663666 is about 205.3842959980.

The spelling of 8663666 in words is "eight million, six hundred sixty-three thousand, six hundred sixty-six".