12009660 has 96 divisors (see below), whose sum is σ = 36832320. Its totient is φ = 2906112.

The previous prime is 12009643. The next prime is 12009707. The reversal of 12009660 is 6690021.

12009660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12009660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69334 + ... + 69506.

It is an arithmetic number, because the mean of its divisors is an integer number (383670).

Almost surely, 2^12009660 is an apocalyptic number.

12009660 is a gapful number since it is divisible by the number (10) 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 12009660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18416160).

12009660 is an abundant number, since it is smaller than the sum of its proper divisors (24822660).

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

12009660 is a wasteful number, since it uses less digits than its factorization.

12009660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 12009660 is about 3465.4956355477. The cubic root of 12009660 is about 229.0042650312.

Adding to 12009660 its reverse (6690021), we get a palindrome (18699681).

The spelling of 12009660 in words is "twelve million, nine thousand, six hundred sixty".