6666894688664 has 16 divisors (see below), whose sum is σ = 14286202904400. Its totient is φ = 2857240580832.

The previous prime is 6666894688637. The next prime is 6666894688673. The reversal of 6666894688664 is 4668864986666.

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, 59525845379 + ... + 59525845490.

It is an arithmetic number, because the mean of its divisors is an integer number (892887681525).

Almost surely, 2^{6666894688664} is an apocalyptic number.

It is an amenable number.

6666894688664 is an abundant number, since it is smaller than the sum of its proper divisors (7619308215736).

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

6666894688664 is a wasteful number, since it uses less digits than its factorization.

6666894688664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119051690882 (or 119051690878 counting only the distinct ones).

The product of its digits is 20639121408, while the sum is 83.

The spelling of 6666894688664 in words is "six trillion, six hundred sixty-six billion, eight hundred ninety-four million, six hundred eighty-eight thousand, six hundred sixty-four".