12489423666 has 8 divisors (see below), whose sum is σ = 24978847344. Its totient is φ = 4163141220.

The previous prime is 12489423647. The next prime is 12489423697. The reversal of 12489423666 is 66632498421.

12489423666 is digitally balanced in base 5, 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.

12489423666 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1040785300 + ... + 1040785311.

It is an arithmetic number, because the mean of its divisors is an integer number (3122355918).

Almost surely, 2^12489423666 is an apocalyptic number.

12489423666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12489423666 is a wasteful number, since it uses less digits than its factorization.

12489423666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2081570616.

The product of its digits is 2985984, while the sum is 51.

The spelling of 12489423666 in words is "twelve billion, four hundred eighty-nine million, four hundred twenty-three thousand, six hundred sixty-six".