9866816 has 28 divisors (see below), whose sum is σ = 20433792. Its totient is φ = 4718208.

The previous prime is 9866809. The next prime is 9866819. The reversal of 9866816 is 6186689.

It is not an unprimeable number, because it can be changed into a prime (9866819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1880 + ... + 4823.

Almost surely, 2^9866816 is an apocalyptic number.

It is an amenable number.

9866816 is an abundant number, since it is smaller than the sum of its proper divisors (10566976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9866816 is a wasteful number, since it uses less digits than its factorization.

9866816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738 (or 6728 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 9866816 is about 3141.1488344235. The cubic root of 9866816 is about 214.4827370585.

The spelling of 9866816 in words is "nine million, eight hundred sixty-six thousand, eight hundred sixteen".