12003663 has 8 divisors (see below), whose sum is σ = 18291328. Its totient is φ = 6859224.

The previous prime is 12003647. The next prime is 12003671. The reversal of 12003663 is 36630021.

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

It is not a de Polignac number, because 12003663 - 2⁴ = 12003647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 571603 = 12003663 / (1 + 2 + 0 + 0 + 3 + 6 + 6 + 3).

It is a Duffinian number.

12003663 is a modest number, since divided by 3663 gives 12 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12003613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285781 + ... + 285822.

It is an arithmetic number, because the mean of its divisors is an integer number (2286416).

Almost surely, 2^12003663 is an apocalyptic number.

12003663 is a deficient number, since it is larger than the sum of its proper divisors (6287665).

12003663 is an equidigital number, since it uses as much as digits as its factorization.

12003663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571613.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 12003663 is about 3464.6302833059. The cubic root of 12003663 is about 228.9661410756.

Adding to 12003663 its reverse (36630021), we get a palindrome (48633684).

The spelling of 12003663 in words is "twelve million, three thousand, six hundred sixty-three".