8861566 has 16 divisors (see below), whose sum is σ = 15231456. Its totient is φ = 3787776.

The previous prime is 8861563. The next prime is 8861597. The reversal of 8861566 is 6651688.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8861561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7530 + ... + 8626.

It is an arithmetic number, because the mean of its divisors is an integer number (951966).

Almost surely, 2^8861566 is an apocalyptic number.

8861566 is a deficient number, since it is larger than the sum of its proper divisors (6369890).

8861566 is a wasteful number, since it uses less digits than its factorization.

8861566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683.

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

The square root of 8861566 is about 2976.8382555994. The cubic root of 8861566 is about 206.9363694674.

The spelling of 8861566 in words is "eight million, eight hundred sixty-one thousand, five hundred sixty-six".