12666456732 has 24 divisors (see below), whose sum is σ = 29767696000. Its totient is φ = 4191776496.

The previous prime is 12666456727. The next prime is 12666456739. The reversal of 12666456732 is 23765466621.

It is a super-2 number, since 2×12666456732² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12666456739) 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, 3795232 + ... + 3798567.

Almost surely, 2^12666456732 is an apocalyptic number.

12666456732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12666456732 is an abundant number, since it is smaller than the sum of its proper divisors (17101239268).

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

12666456732 is a wasteful number, since it uses less digits than its factorization.

12666456732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7593945 (or 7593943 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 48.

The spelling of 12666456732 in words is "twelve billion, six hundred sixty-six million, four hundred fifty-six thousand, seven hundred thirty-two".