8221866 has 8 divisors (see below), whose sum is σ = 16443744. Its totient is φ = 2740620.

The previous prime is 8221859. The next prime is 8221891. The reversal of 8221866 is 6681228.

It is a sphenic number, since it is the product of 3 distinct primes.

8221866 is an admirable number.

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, 685150 + ... + 685161.

It is an arithmetic number, because the mean of its divisors is an integer number (2055468).

Almost surely, 2^8221866 is an apocalyptic number.

8221866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

8221866 is a wasteful number, since it uses less digits than its factorization.

8221866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370316.

The product of its digits is 9216, while the sum is 33.

The square root of 8221866 is about 2867.3796400198. The cubic root of 8221866 is about 201.8320500538.

The spelling of 8221866 in words is "eight million, two hundred twenty-one thousand, eight hundred sixty-six".