12660223688 has 36 divisors (see below), whose sum is σ = 27618357915. Its totient is φ = 5424855408.

The previous prime is 12660223643. The next prime is 12660223757. The reversal of 12660223688 is 88632206621.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 6330111844 + 6330111844 = 79562^2 + 79562^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=79562.

It is a Duffinian number.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 2224895 + ... + 2230577.

Almost surely, 2^12660223688 is an apocalyptic number.

It is an amenable number.

12660223688 is an abundant number, since it is smaller than the sum of its proper divisors (14958134227).

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

12660223688 is an frugal number, since it uses more digits than its factorization.

12660223688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11386 (or 5692 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The spelling of 12660223688 in words is "twelve billion, six hundred sixty million, two hundred twenty-three thousand, six hundred eighty-eight".