12551120553666 has 16 divisors (see below), whose sum is σ = 25160213955744. Its totient is φ = 4174044709824.

The previous prime is 12551120553593. The next prime is 12551120553683. The reversal of 12551120553666 is 66635502115521.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2415532536 + ... + 2415537731.

It is an arithmetic number, because the mean of its divisors is an integer number (1572513372234).

Almost surely, 2^{12551120553666} is an apocalyptic number.

12551120553666 is an abundant number, since it is smaller than the sum of its proper divisors (12609093402078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12551120553666 is a wasteful number, since it uses less digits than its factorization.

12551120553666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831070705.

The product of its (nonzero) digits is 1620000, while the sum is 48.

The spelling of 12551120553666 in words is "twelve trillion, five hundred fifty-one billion, one hundred twenty million, five hundred fifty-three thousand, six hundred sixty-six".