12345666680 has 64 divisors (see below), whose sum is σ = 27923888160. Its totient is φ = 4912365568.

The previous prime is 12345666677. The next prime is 12345666721. The reversal of 12345666680 is 8666654321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7948784 + ... + 7950336.

Almost surely, 2^12345666680 is an apocalyptic number.

12345666680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12345666680 is an abundant number, since it is smaller than the sum of its proper divisors (15578221480).

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

12345666680 is a wasteful number, since it uses less digits than its factorization.

12345666680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480 (or 2476 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 47.

The spelling of 12345666680 in words is "twelve billion, three hundred forty-five million, six hundred sixty-six thousand, six hundred eighty".