12651666553 has 8 divisors (see below), whose sum is σ = 13642362720. Its totient is φ = 11693452320.

The previous prime is 12651666499. The next prime is 12651666589. The reversal of 12651666553 is 35566615621.

12651666553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12651666553 - 2¹³ = 12651658361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12651696553) 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 7 ways as a sum of consecutive naturals, for example, 8119675 + ... + 8121232.

It is an arithmetic number, because the mean of its divisors is an integer number (1705295340).

Almost surely, 2^12651666553 is an apocalyptic number.

It is an amenable number.

12651666553 is a deficient number, since it is larger than the sum of its proper divisors (990696167).

12651666553 is a wasteful number, since it uses less digits than its factorization.

12651666553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16240967.

The product of its digits is 972000, while the sum is 46.

The spelling of 12651666553 in words is "twelve billion, six hundred fifty-one million, six hundred sixty-six thousand, five hundred fifty-three".