12665028888 has 64 divisors (see below), whose sum is σ = 35278848000. Its totient is φ = 4209890976.

The previous prime is 12665028793. The next prime is 12665028907. The reversal of 12665028888 is 88882056621.

It is a happy number.

12665028888 is a `hidden beast` number, since 126 + 6 + 502 + 8 + 8 + 8 + 8 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4120 + ... + 159207.

It is an arithmetic number, because the mean of its divisors is an integer number (551232000).

Almost surely, 2^12665028888 is an apocalyptic number.

12665028888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12665028888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17639424000).

12665028888 is an abundant number, since it is smaller than the sum of its proper divisors (22613819112).

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

12665028888 is a wasteful number, since it uses less digits than its factorization.

12665028888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163701 (or 163691 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 54.

The spelling of 12665028888 in words is "twelve billion, six hundred sixty-five million, twenty-eight thousand, eight hundred eighty-eight".