12662656563 has 4 divisors (see below), whose sum is σ = 16883542088. Its totient is φ = 8441771040.

The previous prime is 12662656553. The next prime is 12662656607. The reversal of 12662656563 is 36565626621.

12662656563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12662656563 - 2²⁸ = 12394221107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12662656543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2110442758 + ... + 2110442763.

It is an arithmetic number, because the mean of its divisors is an integer number (4220885522).

Almost surely, 2^12662656563 is an apocalyptic number.

12662656563 is a deficient number, since it is larger than the sum of its proper divisors (4220885525).

12662656563 is an equidigital number, since it uses as much as digits as its factorization.

12662656563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4220885524.

The product of its digits is 2332800, while the sum is 48.

The spelling of 12662656563 in words is "twelve billion, six hundred sixty-two million, six hundred fifty-six thousand, five hundred sixty-three".