12660427684 has 12 divisors (see below), whose sum is σ = 22158265500. Its totient is φ = 6329494688.

The previous prime is 12660427649. The next prime is 12660427687. The reversal of 12660427684 is 48672406621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6411525184 + 6248902500 = 80072^2 + 79050^2 .

It is not an unprimeable number, because it can be changed into a prime (12660427687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139159 + ... + 211390.

It is an arithmetic number, because the mean of its divisors is an integer number (1846522125).

Almost surely, 2^12660427684 is an apocalyptic number.

It is an amenable number.

12660427684 is a deficient number, since it is larger than the sum of its proper divisors (9497837816).

12660427684 is a wasteful number, since it uses less digits than its factorization.

12660427684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359582 (or 359580 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 46.

The spelling of 12660427684 in words is "twelve billion, six hundred sixty million, four hundred twenty-seven thousand, six hundred eighty-four".