12186606666 has 16 divisors (see below), whose sum is σ = 26248076064. Its totient is φ = 3749725104.

The previous prime is 12186606661. The next prime is 12186606697. The reversal of 12186606666 is 66660668121.

It is not an unprimeable number, because it can be changed into a prime (12186606661) 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, 78119196 + ... + 78119351.

It is an arithmetic number, because the mean of its divisors is an integer number (1640504754).

Almost surely, 2^12186606666 is an apocalyptic number.

12186606666 is an abundant number, since it is smaller than the sum of its proper divisors (14061469398).

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

12186606666 is a wasteful number, since it uses less digits than its factorization.

12186606666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156238565.

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 12186606666 in words is "twelve billion, one hundred eighty-six million, six hundred six thousand, six hundred sixty-six".