12655566220 has 48 divisors (see below), whose sum is σ = 29004546816. Its totient is φ = 4600152000.

The previous prime is 12655566167. The next prime is 12655566251. The reversal of 12655566220 is 2266555621.

12655566220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603715 + ... + 624325.

It is an arithmetic number, because the mean of its divisors is an integer number (604261392).

Almost surely, 2^12655566220 is an apocalyptic number.

12655566220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12655566220 is an abundant number, since it is smaller than the sum of its proper divisors (16348980596).

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

12655566220 is a wasteful number, since it uses less digits than its factorization.

12655566220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23422 (or 23420 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 40.

It can be divided in two parts, 12655 and 566220, that added together give a palindrome (578875).

The spelling of 12655566220 in words is "twelve billion, six hundred fifty-five million, five hundred sixty-six thousand, two hundred twenty".