6517664980 has 12 divisors (see below), whose sum is σ = 13687096500. Its totient is φ = 2607065984.

The previous prime is 6517664977. The next prime is 6517665017. The reversal of 6517664980 is 894667156.

It can be written as a sum of positive squares in 2 ways, for example, as 4131147076 + 2386517904 = 64274^2 + 48852^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 162941605 + ... + 162941644.

It is an arithmetic number, because the mean of its divisors is an integer number (1140591375).

Almost surely, 2^6517664980 is an apocalyptic number.

It is an amenable number.

6517664980 is an abundant number, since it is smaller than the sum of its proper divisors (7169431520).

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

6517664980 is a wasteful number, since it uses less digits than its factorization.

6517664980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325883258 (or 325883256 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The square root of 6517664980 is about 80732.0567061189. The cubic root of 6517664980 is about 1867.9446834064.

The spelling of 6517664980 in words is "six billion, five hundred seventeen million, six hundred sixty-four thousand, nine hundred eighty".