12660678 has 16 divisors (see below), whose sum is σ = 28134960. Its totient is φ = 4220208.

The previous prime is 12660671. The next prime is 12660721. The reversal of 12660678 is 87606621.

It is a happy number.

12660678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12660671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117175 + ... + 117282.

It is an arithmetic number, because the mean of its divisors is an integer number (1758435).

Almost surely, 2^12660678 is an apocalyptic number.

12660678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12660678 is an abundant number, since it is smaller than the sum of its proper divisors (15474282).

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

12660678 is a wasteful number, since it uses less digits than its factorization.

12660678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234468 (or 234462 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 12660678 is about 3558.1846495088. The cubic root of 12660678 is about 233.0696127046.

The spelling of 12660678 in words is "twelve million, six hundred sixty thousand, six hundred seventy-eight".