12663370655 has 16 divisors (see below), whose sum is σ = 16425381504. Its totient is φ = 9316892160.

The previous prime is 12663370639. The next prime is 12663370691. The reversal of 12663370655 is 55607336621.

It is a happy number.

It is not a de Polignac number, because 12663370655 - 2⁴ = 12663370639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 341834 + ... + 377063.

It is an arithmetic number, because the mean of its divisors is an integer number (1026586344).

Almost surely, 2^12663370655 is an apocalyptic number.

12663370655 is a deficient number, since it is larger than the sum of its proper divisors (3762010849).

12663370655 is a wasteful number, since it uses less digits than its factorization.

12663370655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719186.

The product of its (nonzero) digits is 680400, while the sum is 44.

The spelling of 12663370655 in words is "twelve billion, six hundred sixty-three million, three hundred seventy thousand, six hundred fifty-five".