12747443220666 has 96 divisors (see below), whose sum is σ = 34435373102208. Its totient is φ = 3310954859520.

The previous prime is 12747443220619. The next prime is 12747443220683. The reversal of 12747443220666 is 66602234474721.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120963150 + ... + 121068486.

It is an arithmetic number, because the mean of its divisors is an integer number (358701803148).

Almost surely, 2^{12747443220666} is an apocalyptic number.

12747443220666 is an abundant number, since it is smaller than the sum of its proper divisors (21687929881542).

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

12747443220666 is a wasteful number, since it uses less digits than its factorization.

12747443220666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192676 (or 192673 counting only the distinct ones).

The product of its (nonzero) digits is 16257024, while the sum is 54.

The spelling of 12747443220666 in words is "twelve trillion, seven hundred forty-seven billion, four hundred forty-three million, two hundred twenty thousand, six hundred sixty-six".