6605800780 has 12 divisors (see below), whose sum is σ = 13872181680. Its totient is φ = 2642320304.

The previous prime is 6605800769. The next prime is 6605800781. The reversal of 6605800780 is 870085066.

It is not an unprimeable number, because it can be changed into a prime (6605800781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165145000 + ... + 165145039.

It is an arithmetic number, because the mean of its divisors is an integer number (1156015140).

Almost surely, 2^6605800780 is an apocalyptic number.

It is an amenable number.

6605800780 is an abundant number, since it is smaller than the sum of its proper divisors (7266380900).

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

6605800780 is a wasteful number, since it uses less digits than its factorization.

6605800780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330290048 (or 330290046 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 6605800780 is about 81276.0775382277. The cubic root of 6605800780 is about 1876.3268385042.

The spelling of 6605800780 in words is "six billion, six hundred five million, eight hundred thousand, seven hundred eighty".