12666506632 has 16 divisors (see below), whose sum is σ = 25576600140. Its totient is φ = 5846079936.

The previous prime is 12666506621. The next prime is 12666506681. The reversal of 12666506632 is 23660566621.

It can be written as a sum of positive squares in 2 ways, for example, as 11652338916 + 1014167716 = 107946^2 + 31846^2 .

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 3 ways as a sum of consecutive naturals, for example, 60896563 + ... + 60896770.

Almost surely, 2^12666506632 is an apocalyptic number.

It is an amenable number.

12666506632 is an abundant number, since it is smaller than the sum of its proper divisors (12910093508).

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

12666506632 is a wasteful number, since it uses less digits than its factorization.

12666506632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121793352 (or 121793348 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 43.

The spelling of 12666506632 in words is "twelve billion, six hundred sixty-six million, five hundred six thousand, six hundred thirty-two".