6728686768 has 40 divisors (see below), whose sum is σ = 13937777568. Its totient is φ = 3135685632.

The previous prime is 6728686729. The next prime is 6728686873. The reversal of 6728686768 is 8676868276.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92071 + ... + 148102.

Almost surely, 2^6728686768 is an apocalyptic number.

6728686768 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

6728686768 is an abundant number, since it is smaller than the sum of its proper divisors (7209090800).

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

6728686768 is a wasteful number, since it uses less digits than its factorization.

6728686768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240301 (or 240295 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 64.

The square root of 6728686768 is about 82028.5728755536. The cubic root of 6728686768 is about 1887.8903672694.

The spelling of 6728686768 in words is "six billion, seven hundred twenty-eight million, six hundred eighty-six thousand, seven hundred sixty-eight".