12128847666 has 16 divisors (see below), whose sum is σ = 26123672064. Its totient is φ = 3731953104.

The previous prime is 12128847631. The next prime is 12128847713. The reversal of 12128847666 is 66674882121.

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 7 ways as a sum of consecutive naturals, for example, 77748946 + ... + 77749101.

It is an arithmetic number, because the mean of its divisors is an integer number (1632729504).

Almost surely, 2^12128847666 is an apocalyptic number.

12128847666 is an abundant number, since it is smaller than the sum of its proper divisors (13994824398).

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

12128847666 is a wasteful number, since it uses less digits than its factorization.

12128847666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155498065.

The product of its digits is 1548288, while the sum is 51.

The spelling of 12128847666 in words is "twelve billion, one hundred twenty-eight million, eight hundred forty-seven thousand, six hundred sixty-six".