6516648866 has 48 divisors (see below), whose sum is σ = 12256466040. Its totient is φ = 2575722240.

The previous prime is 6516648847. The next prime is 6516648881. The reversal of 6516648866 is 6688466156.

It can be written as a sum of positive squares in 4 ways, for example, as 4326876841 + 2189772025 = 65779^2 + 46795^2 .

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, 2583686 + ... + 2586206.

Almost surely, 2^6516648866 is an apocalyptic number.

6516648866 is a deficient number, since it is larger than the sum of its proper divisors (5739817174).

6516648866 is a wasteful number, since it uses less digits than its factorization.

6516648866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4579 (or 4572 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 56.

The square root of 6516648866 is about 80725.7633348858. The cubic root of 6516648866 is about 1867.8476065446.

The spelling of 6516648866 in words is "six billion, five hundred sixteen million, six hundred forty-eight thousand, eight hundred sixty-six".