6775591728 has 50 divisors (see below), whose sum is σ = 17665682444. Its totient is φ = 2237810112.

The previous prime is 6775591727. The next prime is 6775591777. The reversal of 6775591728 is 8271955776.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (6775591721) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 62161338 + ... + 62161446.

Almost surely, 2^6775591728 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 6775591728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8832841222).

6775591728 is an abundant number, since it is smaller than the sum of its proper divisors (10890090716).

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

6775591728 is an frugal number, since it uses more digits than its factorization.

6775591728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 114 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 57.

The square root of 6775591728 is about 82313.9825789033. The cubic root of 6775591728 is about 1892.2669743513.

The spelling of 6775591728 in words is "six billion, seven hundred seventy-five million, five hundred ninety-one thousand, seven hundred twenty-eight".