6646727747900 has 18 divisors (see below), whose sum is σ = 14423399213160. Its totient is φ = 2658691099120.

The previous prime is 6646727747897. The next prime is 6646727747939. The reversal of 6646727747900 is 97477276466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 33233638640 + ... + 33233638839.

Almost surely, 2^{6646727747900} is an apocalyptic number.

It is an amenable number.

6646727747900 is an abundant number, since it is smaller than the sum of its proper divisors (7776671465260).

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

6646727747900 is a wasteful number, since it uses less digits than its factorization.

6646727747900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66467277493 (or 66467277486 counting only the distinct ones).

The product of its (nonzero) digits is 149361408, while the sum is 65.

The spelling of 6646727747900 in words is "six trillion, six hundred forty-six billion, seven hundred twenty-seven million, seven hundred forty-seven thousand, nine hundred".