12138880666 has 8 divisors (see below), whose sum is σ = 19863622944. Its totient is φ = 5517673020.

The previous prime is 12138880661. The next prime is 12138880667. The reversal of 12138880666 is 66608883121.

12138880666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (12138880661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275883630 + ... + 275883673.

It is an arithmetic number, because the mean of its divisors is an integer number (2482952868).

Almost surely, 2^12138880666 is an apocalyptic number.

12138880666 is a deficient number, since it is larger than the sum of its proper divisors (7724742278).

12138880666 is a wasteful number, since it uses less digits than its factorization.

12138880666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551767316.

The product of its (nonzero) digits is 663552, while the sum is 49.

The spelling of 12138880666 in words is "twelve billion, one hundred thirty-eight million, eight hundred eighty thousand, six hundred sixty-six".