12544350666 has 32 divisors (see below), whose sum is σ = 25635356928. Its totient is φ = 4090430400.

The previous prime is 12544350661. The next prime is 12544350737. The reversal of 12544350666 is 66605344521.

It is not an unprimeable number, because it can be changed into a prime (12544350661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 614016 + ... + 634116.

It is an arithmetic number, because the mean of its divisors is an integer number (801104904).

Almost surely, 2^12544350666 is an apocalyptic number.

12544350666 is an abundant number, since it is smaller than the sum of its proper divisors (13091006262).

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

12544350666 is a wasteful number, since it uses less digits than its factorization.

12544350666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22366.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 12544350666 in words is "twelve billion, five hundred forty-four million, three hundred fifty thousand, six hundred sixty-six".