12663618387 has 8 divisors (see below), whose sum is σ = 19296942336. Its totient is φ = 7236353352.

The previous prime is 12663618307. The next prime is 12663618403. The reversal of 12663618387 is 78381636621.

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

It is not a de Polignac number, because 12663618387 - 2¹⁹ = 12663094099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12663618307) 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, 301514703 + ... + 301514744.

It is an arithmetic number, because the mean of its divisors is an integer number (2412117792).

Almost surely, 2^12663618387 is an apocalyptic number.

12663618387 is a deficient number, since it is larger than the sum of its proper divisors (6633323949).

12663618387 is an equidigital number, since it uses as much as digits as its factorization.

12663618387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603029457.

The product of its digits is 1741824, while the sum is 51.

It can be divided in two parts, 12 and 663618387, that multiplied together give a square (7963420644 = 89238²).

The spelling of 12663618387 in words is "twelve billion, six hundred sixty-three million, six hundred eighteen thousand, three hundred eighty-seven".