12668360221696 has 33 divisors (see below), whose sum is σ = 25324576681579. Its totient is φ = 6334123162624.

The previous prime is 12668360221651. The next prime is 12668360221697. The reversal of 12668360221696 is 69612206386621.

The square root of 12668360221696 is 3559264.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12668360221696.

It is not an unprimeable number, because it can be changed into a prime (12668360221697) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 113840835 + ... + 113952061.

Almost surely, 2^{12668360221696} is an apocalyptic number.

12668360221696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

12668360221696 is the 3559264-th square number.

It is an amenable number.

12668360221696 is a deficient number, since it is larger than the sum of its proper divisors (12656216459883).

12668360221696 is an frugal number, since it uses more digits than its factorization.

12668360221696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222474 (or 111229 counting only the distinct ones).

The product of its (nonzero) digits is 13436928, while the sum is 58.

The spelling of 12668360221696 in words is "twelve trillion, six hundred sixty-eight billion, three hundred sixty million, two hundred twenty-one thousand, six hundred ninety-six".