12667540678 has 24 divisors (see below), whose sum is σ = 20582137368. Its totient is φ = 5844638592.

The previous prime is 12667540643. The next prime is 12667540703. The reversal of 12667540678 is 87604576621.

12667540678 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 (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1876926 + ... + 1883662.

It is an arithmetic number, because the mean of its divisors is an integer number (857589057).

Almost surely, 2^12667540678 is an apocalyptic number.

12667540678 is a deficient number, since it is larger than the sum of its proper divisors (7914596690).

12667540678 is a wasteful number, since it uses less digits than its factorization.

12667540678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12328 (or 12315 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 12667540678 in words is "twelve billion, six hundred sixty-seven million, five hundred forty thousand, six hundred seventy-eight".