8566816 has 12 divisors (see below), whose sum is σ = 16865982. Its totient is φ = 4283392.

The previous prime is 8566813. The next prime is 8566823. The reversal of 8566816 is 6186658.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8410000 + 156816 = 2900^2 + 396^2 .

It is not an unprimeable number, because it can be changed into a prime (8566813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133825 + ... + 133888.

Almost surely, 2^8566816 is an apocalyptic number.

It is an amenable number.

8566816 is a deficient number, since it is larger than the sum of its proper divisors (8299166).

8566816 is a wasteful number, since it uses less digits than its factorization.

8566816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267723 (or 267715 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 8566816 is about 2926.9123663000. The cubic root of 8566816 is about 204.6161048634.

The spelling of 8566816 in words is "eight million, five hundred sixty-six thousand, eight hundred sixteen".