12555751854666 has 16 divisors (see below), whose sum is σ = 25111580213088. Its totient is φ = 4185237867600.

The previous prime is 12555751854647. The next prime is 12555751854689. The reversal of 12555751854666 is 66645815755521.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12555751854597 and 12555751854606.

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, 931240 + ... + 5096931.

It is an arithmetic number, because the mean of its divisors is an integer number (1569473763318).

Almost surely, 2^{12555751854666} is an apocalyptic number.

12555751854666 is an abundant number, since it is smaller than the sum of its proper divisors (12555828358422).

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

12555751854666 is a wasteful number, since it uses less digits than its factorization.

12555751854666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6375317.

The product of its digits is 302400000, while the sum is 66.

The spelling of 12555751854666 in words is "twelve trillion, five hundred fifty-five billion, seven hundred fifty-one million, eight hundred fifty-four thousand, six hundred sixty-six".