663222222 has 64 divisors (see below), whose sum is σ = 1607424000. Its totient is φ = 201468384.

The previous prime is 663222221. The next prime is 663222229. The reversal of 663222222 is 222222366.

663222222 is a `hidden beast` number, since 6 + 632 + 2 + 2 + 2 + 22 = 666.

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

It is a nude number because it is divisible by every one of its digits.

663222222 is a modest number, since divided by 22222 gives 6632 as remainder.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663222221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49479 + ... + 61437.

It is an arithmetic number, because the mean of its divisors is an integer number (25116000).

Almost surely, 2^663222222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663222222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (803712000).

663222222 is an abundant number, since it is smaller than the sum of its proper divisors (944201778).

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

663222222 is a wasteful number, since it uses less digits than its factorization.

663222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12062 (or 12056 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 663222222 is about 25753.1012113105. The cubic root of 663222222 is about 872.0733664037.

Adding to 663222222 its reverse (222222366), we get a palindrome (885444588).

The spelling of 663222222 in words is "six hundred sixty-three million, two hundred twenty-two thousand, two hundred twenty-two".