12663216 has 60 divisors (see below), whose sum is σ = 36763272. Its totient is φ = 4219776.

The previous prime is 12663197. The next prime is 12663223. The reversal of 12663216 is 61236621.

12663216 is a `hidden beast` number, since 1 + 26 + 632 + 1 + 6 = 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.

It is a self number, because there is not a number n which added to its sum of digits gives 12663216.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2260 + ... + 5516.

Almost surely, 2^12663216 is an apocalyptic number.

12663216 is a gapful number since it is divisible by the number (16) 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 12663216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18381636).

12663216 is an abundant number, since it is smaller than the sum of its proper divisors (24100056).

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

12663216 is an equidigital number, since it uses as much as digits as its factorization.

12663216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3280 (or 3262 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 12663216 is about 3558.5412741740. The cubic root of 12663216 is about 233.0851856240.

Adding to 12663216 its reverse (61236621), we get a palindrome (73899837).

The spelling of 12663216 in words is "twelve million, six hundred sixty-three thousand, two hundred sixteen".