12021624666 has 16 divisors (see below), whose sum is σ = 26714721600. Its totient is φ = 4007208204.

The previous prime is 12021624661. The next prime is 12021624683. The reversal of 12021624666 is 66642612021.

It is a super-2 number, since 2×12021624666² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12021624666.

It is not an unprimeable number, because it can be changed into a prime (12021624661) by changing a digit.

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, 111311286 + ... + 111311393.

It is an arithmetic number, because the mean of its divisors is an integer number (1669670100).

Almost surely, 2^12021624666 is an apocalyptic number.

12021624666 is an abundant number, since it is smaller than the sum of its proper divisors (14693096934).

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

12021624666 is a wasteful number, since it uses less digits than its factorization.

12021624666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222622690 (or 222622684 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 12021624666 in words is "twelve billion, twenty-one million, six hundred twenty-four thousand, six hundred sixty-six".