12666642443216 has 40 divisors (see below), whose sum is σ = 26206846464000. Its totient is φ = 5917674994560.

The previous prime is 12666642443101. The next prime is 12666642443261. The reversal of 12666642443216 is 61234424666621.

12666642443216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440288816 + ... + 440317583.

It is an arithmetic number, because the mean of its divisors is an integer number (655171161600).

Almost surely, 2^{12666642443216} is an apocalyptic number.

12666642443216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12666642443216 is an abundant number, since it is smaller than the sum of its proper divisors (13540204020784).

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

12666642443216 is a wasteful number, since it uses less digits than its factorization.

12666642443216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880606467 (or 880606461 counting only the distinct ones).

The product of its digits is 11943936, while the sum is 53.

The spelling of 12666642443216 in words is "twelve trillion, six hundred sixty-six billion, six hundred forty-two million, four hundred forty-three thousand, two hundred sixteen".