6605985207996 has 72 divisors (see below), whose sum is σ = 16924509900480. Its totient is φ = 2172235014144.

The previous prime is 6605985207973. The next prime is 6605985208003. The reversal of 6605985207996 is 6997025895066.

6605985207996 is a `hidden beast` number, since 6 + 6 + 0 + 5 + 9 + 8 + 520 + 7 + 9 + 96 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2271856 + ... + 4286408.

Almost surely, 2^{6605985207996} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6605985207996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8462254950240).

6605985207996 is an abundant number, since it is smaller than the sum of its proper divisors (10318524692484).

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

6605985207996 is a wasteful number, since it uses less digits than its factorization.

6605985207996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015795 (or 2015790 counting only the distinct ones).

The product of its (nonzero) digits is 440899200, while the sum is 72.

The spelling of 6605985207996 in words is "six trillion, six hundred five billion, nine hundred eighty-five million, two hundred seven thousand, nine hundred ninety-six".