6605774660 has 24 divisors (see below), whose sum is σ = 14688135000. Its totient is φ = 2486879744.

The previous prime is 6605774603. The next prime is 6605774689. The reversal of 6605774660 is 664775066.

It can be written as a sum of positive squares in 4 ways, for example, as 119727364 + 6486047296 = 10942^2 + 80536^2 .

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, 9714035 + ... + 9714714.

It is an arithmetic number, because the mean of its divisors is an integer number (612005625).

Almost surely, 2^6605774660 is an apocalyptic number.

It is an amenable number.

6605774660 is an abundant number, since it is smaller than the sum of its proper divisors (8082360340).

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

6605774660 is a wasteful number, since it uses less digits than its factorization.

6605774660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19428775 (or 19428773 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 47.

The square root of 6605774660 is about 81275.9168511805. The cubic root of 6605774660 is about 1876.3243654394.

The spelling of 6605774660 in words is "six billion, six hundred five million, seven hundred seventy-four thousand, six hundred sixty".