6751366721 has 16 divisors (see below), whose sum is σ = 7804944000. Its totient is φ = 5781417600.

The previous prime is 6751366697. The next prime is 6751366733. The reversal of 6751366721 is 1276631576.

It is a cyclic number.

It is not a de Polignac number, because 6751366721 - 2¹⁴ = 6751350337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6751366771) 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, 245021 + ... + 271178.

It is an arithmetic number, because the mean of its divisors is an integer number (487809000).

Almost surely, 2^6751366721 is an apocalyptic number.

It is an amenable number.

6751366721 is a deficient number, since it is larger than the sum of its proper divisors (1053577279).

6751366721 is a wasteful number, since it uses less digits than its factorization.

6751366721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516280.

The product of its digits is 317520, while the sum is 44.

The square root of 6751366721 is about 82166.7008039145. The cubic root of 6751366721 is about 1890.0091188683.

The spelling of 6751366721 in words is "six billion, seven hundred fifty-one million, three hundred sixty-six thousand, seven hundred twenty-one".