6801084721 has 4 divisors (see below), whose sum is σ = 6817713700. Its totient is φ = 6784455744.

The previous prime is 6801084701. The next prime is 6801084743. The reversal of 6801084721 is 1274801086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3283290000 + 3517794721 = 57300^2 + 59311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6801084721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6801084701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8313876 + ... + 8314693.

It is an arithmetic number, because the mean of its divisors is an integer number (1704428425).

Almost surely, 2^6801084721 is an apocalyptic number.

It is an amenable number.

6801084721 is a deficient number, since it is larger than the sum of its proper divisors (16628979).

6801084721 is a wasteful number, since it uses less digits than its factorization.

6801084721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16628978.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 6801084721 is about 82468.6893372266. The cubic root of 6801084721 is about 1894.6372064422.

The spelling of 6801084721 in words is "six billion, eight hundred one million, eighty-four thousand, seven hundred twenty-one".