6689385760 has 96 divisors (see below), whose sum is σ = 16777765872. Its totient is φ = 2511667200.

The previous prime is 6689385737. The next prime is 6689385761. The reversal of 6689385760 is 675839866.

It can be written as a sum of positive squares in 8 ways, for example, as 6663130384 + 26255376 = 81628^2 + 5124^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6689385695 and 6689385704.

It is not an unprimeable number, because it can be changed into a prime (6689385761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1087654 + ... + 1093786.

Almost surely, 2^6689385760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6689385760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8388882936).

6689385760 is an abundant number, since it is smaller than the sum of its proper divisors (10088380112).

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

6689385760 is a wasteful number, since it uses less digits than its factorization.

6689385760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6566 (or 6558 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 58.

The square root of 6689385760 is about 81788.6652293580. The cubic root of 6689385760 is about 1884.2075822740.

The spelling of 6689385760 in words is "six billion, six hundred eighty-nine million, three hundred eighty-five thousand, seven hundred sixty".