6680660865 has 48 divisors (see below), whose sum is σ = 11052915264. Its totient is φ = 3444488320.

The previous prime is 6680660821. The next prime is 6680660869. The reversal of 6680660865 is 5680660866.

It is not a de Polignac number, because 6680660865 - 2¹² = 6680656769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6680660869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4006762 + ... + 4008428.

It is an arithmetic number, because the mean of its divisors is an integer number (230269068).

Almost surely, 2^6680660865 is an apocalyptic number.

It is an amenable number.

6680660865 is a deficient number, since it is larger than the sum of its proper divisors (4372254399).

6680660865 is a wasteful number, since it uses less digits than its factorization.

6680660865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870 (or 1799 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 51.

The square root of 6680660865 is about 81735.3097810243. The cubic root of 6680660865 is about 1883.3880418667.

Subtracting from 6680660865 its reverse (5680660866), we obtain a palindrome (999999999).

The spelling of 6680660865 in words is "six billion, six hundred eighty million, six hundred sixty thousand, eight hundred sixty-five".