12446511666 has 32 divisors (see below), whose sum is σ = 24997291200. Its totient is φ = 4131482304.

The previous prime is 12446511661. The next prime is 12446511743. The reversal of 12446511666 is 66611564421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12446511661) 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 15 ways as a sum of consecutive naturals, for example, 3688356 + ... + 3691728.

It is an arithmetic number, because the mean of its divisors is an integer number (781165350).

Almost surely, 2^12446511666 is an apocalyptic number.

12446511666 is an abundant number, since it is smaller than the sum of its proper divisors (12550779534).

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

12446511666 is a wasteful number, since it uses less digits than its factorization.

12446511666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5770.

The product of its digits is 207360, while the sum is 42.

The spelling of 12446511666 in words is "twelve billion, four hundred forty-six million, five hundred eleven thousand, six hundred sixty-six".