663220224 has 130 divisors (see below), whose sum is σ = 1982222000. Its totient is φ = 220962816.

The previous prime is 663220219. The next prime is 663220253. The reversal of 663220224 is 422022366.

663220224 is a `hidden beast` number, since 6 + 632 + 2 + 0 + 2 + 24 = 666.

It is a super-2 number, since 2×663220224² = 879722131045220352, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 330777 + ... + 332775.

Almost surely, 2^663220224 is an apocalyptic number.

663220224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663220224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991111000).

663220224 is an abundant number, since it is smaller than the sum of its proper divisors (1319001776).

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

663220224 is an equidigital number, since it uses as much as digits as its factorization.

663220224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035 (or 2004 counting only the distinct ones).

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

The square root of 663220224 is about 25753.0624198366. The cubic root of 663220224 is about 872.0724906770.

The spelling of 663220224 in words is "six hundred sixty-three million, two hundred twenty thousand, two hundred twenty-four".