12345666706660 has 96 divisors (see below), whose sum is σ = 29797090202880. Its totient is φ = 4208922114048.

The previous prime is 12345666706643. The next prime is 12345666706661. The reversal of 12345666706660 is 6660766654321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12345666706595 and 12345666706604.

It is not an unprimeable number, because it can be changed into a prime (12345666706661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23850112 + ... + 24362248.

It is an arithmetic number, because the mean of its divisors is an integer number (310386356280).

Almost surely, 2^{12345666706660} is an apocalyptic number.

12345666706660 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 12345666706660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14898545101440).

12345666706660 is an abundant number, since it is smaller than the sum of its proper divisors (17451423496220).

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

12345666706660 is a wasteful number, since it uses less digits than its factorization.

12345666706660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513125 (or 513123 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 58.

The spelling of 12345666706660 in words is "twelve trillion, three hundred forty-five billion, six hundred sixty-six million, seven hundred six thousand, six hundred sixty".