12665028889 has 8 divisors (see below), whose sum is σ = 13082211072. Its totient is φ = 12248386320.

The previous prime is 12665028793. The next prime is 12665028907. The reversal of 12665028889 is 98882056621.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12665028889 - 2⁹ = 12665028377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12665028589) 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, 86914 + ... + 181339.

It is an arithmetic number, because the mean of its divisors is an integer number (1635276384).

Almost surely, 2^12665028889 is an apocalyptic number.

It is an amenable number.

12665028889 is a deficient number, since it is larger than the sum of its proper divisors (417182183).

12665028889 is a wasteful number, since it uses less digits than its factorization.

12665028889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269807.

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 12665028889 in words is "twelve billion, six hundred sixty-five million, twenty-eight thousand, eight hundred eighty-nine".