12666898530 has 512 divisors, whose sum is σ = 43197235200. Its totient is φ = 2594073600.

The previous prime is 12666898523. The next prime is 12666898547. The reversal of 12666898530 is 3589866621.

It is a happy number.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 22741012 + ... + 22741568.

It is an arithmetic number, because the mean of its divisors is an integer number (84369600).

Almost surely, 2^12666898530 is an apocalyptic number.

12666898530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12666898530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21598617600).

12666898530 is an abundant number, since it is smaller than the sum of its proper divisors (30530336670).

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

12666898530 is a wasteful number, since it uses less digits than its factorization.

12666898530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 12666898530 in words is "twelve billion, six hundred sixty-six million, eight hundred ninety-eight thousand, five hundred thirty".