12066661116 has 36 divisors (see below), whose sum is σ = 30670372824. Its totient is φ = 3999996000.

The previous prime is 12066661067. The next prime is 12066661133. The reversal of 12066661116 is 61116666021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 919410 + ... + 932441.

Almost surely, 2^12066661116 is an apocalyptic number.

It is an amenable number.

12066661116 is an abundant number, since it is smaller than the sum of its proper divisors (18603711708).

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

12066661116 is a wasteful number, since it uses less digits than its factorization.

12066661116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852042 (or 1852037 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 12066661116 in words is "twelve billion, sixty-six million, six hundred sixty-one thousand, one hundred sixteen".