12665351066 has 32 divisors (see below), whose sum is σ = 19534374720. Its totient is φ = 6156720000.

The previous prime is 12665351063. The next prime is 12665351071. The reversal of 12665351066 is 66015356621.

It is a super-2 number, since 2×12665351066² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12665351063) 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, 4193705 + ... + 4196723.

It is an arithmetic number, because the mean of its divisors is an integer number (610449210).

Almost surely, 2^12665351066 is an apocalyptic number.

12665351066 is a deficient number, since it is larger than the sum of its proper divisors (6869023654).

12665351066 is a wasteful number, since it uses less digits than its factorization.

12665351066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 12665351066 in words is "twelve billion, six hundred sixty-five million, three hundred fifty-one thousand, sixty-six".