6605997860 has 48 divisors (see below), whose sum is σ = 17295707520. Its totient is φ = 2059011840.

The previous prime is 6605997847. The next prime is 6605997863. The reversal of 6605997860 is 687995066.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6605997796 and 6605997805.

It is not an unprimeable number, because it can be changed into a prime (6605997863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2143265 + ... + 2146344.

It is an arithmetic number, because the mean of its divisors is an integer number (360327240).

Almost surely, 2^6605997860 is an apocalyptic number.

It is an amenable number.

6605997860 is an abundant number, since it is smaller than the sum of its proper divisors (10689709660).

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

6605997860 is a wasteful number, since it uses less digits than its factorization.

6605997860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4289636 (or 4289634 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The square root of 6605997860 is about 81277.2899400564. The cubic root of 6605997860 is about 1876.3454980041.

The spelling of 6605997860 in words is "six billion, six hundred five million, nine hundred ninety-seven thousand, eight hundred sixty".