6666207677720 has 32 divisors (see below), whose sum is σ = 15050158315920. Its totient is φ = 2657382441600.

The previous prime is 6666207677713. The next prime is 6666207677737. The reversal of 6666207677720 is 277767026666.

It is a congruent number.

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, 284382806 + ... + 284406245.

Almost surely, 2^{6666207677720} is an apocalyptic number.

It is an amenable number.

6666207677720 is an abundant number, since it is smaller than the sum of its proper divisors (8383950638200).

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

6666207677720 is a wasteful number, since it uses less digits than its factorization.

6666207677720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568789355 (or 568789351 counting only the distinct ones).

The product of its (nonzero) digits is 74680704, while the sum is 62.

The spelling of 6666207677720 in words is "six trillion, six hundred sixty-six billion, two hundred seven million, six hundred seventy-seven thousand, seven hundred twenty".