8780666860 has 24 divisors (see below), whose sum is σ = 21073600800. Its totient is φ = 3010514304.

The previous prime is 8780666857. The next prime is 8780666891. The reversal of 8780666860 is 686660878.

It is a super-2 number, since 2×8780666860² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31359385 + ... + 31359664.

It is an arithmetic number, because the mean of its divisors is an integer number (878066700).

Almost surely, 2^8780666860 is an apocalyptic number.

It is an amenable number.

8780666860 is an abundant number, since it is smaller than the sum of its proper divisors (12292933940).

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

8780666860 is a wasteful number, since it uses less digits than its factorization.

8780666860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62719065 (or 62719063 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 55.

The square root of 8780666860 is about 93705.2125551188. The cubic root of 8780666860 is about 2063.0472120610.

The spelling of 8780666860 in words is "eight billion, seven hundred eighty million, six hundred sixty-six thousand, eight hundred sixty".