6850506721 has 2 divisors, whose sum is σ = 6850506722. Its totient is φ = 6850506720.

The previous prime is 6850506683. The next prime is 6850506727. The reversal of 6850506721 is 1276050586.

6850506721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6849383121 + 1123600 = 82761^2 + 1060^2 .

It is a cyclic number.

It is not a de Polignac number, because 6850506721 - 2¹¹ = 6850504673 is a prime.

It is not a weakly prime, because it can be changed into another prime (6850506727) 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 as a sum of consecutive naturals, namely, 3425253360 + 3425253361.

It is an arithmetic number, because the mean of its divisors is an integer number (3425253361).

Almost surely, 2^6850506721 is an apocalyptic number.

It is an amenable number.

6850506721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6850506721 is an equidigital number, since it uses as much as digits as its factorization.

6850506721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 6850506721 is about 82767.7879431364. The cubic root of 6850506721 is about 1899.2154397909.

The spelling of 6850506721 in words is "six billion, eight hundred fifty million, five hundred six thousand, seven hundred twenty-one".