8220663 has 32 divisors (see below), whose sum is σ = 13478400. Its totient is φ = 4910400.

The previous prime is 8220649. The next prime is 8220689. The reversal of 8220663 is 3660228.

8220663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8220663 - 2⁵ = 8220631 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8200663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26278 + ... + 26588.

It is an arithmetic number, because the mean of its divisors is an integer number (421200).

Almost surely, 2^8220663 is an apocalyptic number.

8220663 is a deficient number, since it is larger than the sum of its proper divisors (5257737).

8220663 is a wasteful number, since it uses less digits than its factorization.

8220663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 8220663 is about 2867.1698589376. The cubic root of 8220663 is about 201.8222057435.

The spelling of 8220663 in words is "eight million, two hundred twenty thousand, six hundred sixty-three".