6666857282784 has 24 divisors (see below), whose sum is σ = 17500500367560. Its totient is φ = 2222285760896.

The previous prime is 6666857282773. The next prime is 6666857282873. The reversal of 6666857282784 is 4872827586666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34723214919 + ... + 34723215110.

It is an arithmetic number, because the mean of its divisors is an integer number (729187515315).

Almost surely, 2^{6666857282784} is an apocalyptic number.

It is an amenable number.

6666857282784 is an abundant number, since it is smaller than the sum of its proper divisors (10833643084776).

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

6666857282784 is a wasteful number, since it uses less digits than its factorization.

6666857282784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69446430042 (or 69446430034 counting only the distinct ones).

The product of its digits is 2601123840, while the sum is 75.

The spelling of 6666857282784 in words is "six trillion, six hundred sixty-six billion, eight hundred fifty-seven million, two hundred eighty-two thousand, seven hundred eighty-four".