12002166666 has 48 divisors (see below), whose sum is σ = 30126792384. Its totient is φ = 3382212672.

The previous prime is 12002166643. The next prime is 12002166667. The reversal of 12002166666 is 66666120021.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12002166666.

It is not an unprimeable number, because it can be changed into a prime (12002166667) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 643236 + ... + 661631.

It is an arithmetic number, because the mean of its divisors is an integer number (627641508).

Almost surely, 2^12002166666 is an apocalyptic number.

12002166666 is an abundant number, since it is smaller than the sum of its proper divisors (18124625718).

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

12002166666 is a wasteful number, since it uses less digits than its factorization.

12002166666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304955 (or 1304952 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

Adding to 12002166666 its reverse (66666120021), we get a palindrome (78668286687).

The spelling of 12002166666 in words is "twelve billion, two million, one hundred sixty-six thousand, six hundred sixty-six".