6993334721 has 2 divisors, whose sum is σ = 6993334722. Its totient is φ = 6993334720.

The previous prime is 6993334709. The next prime is 6993334741. The reversal of 6993334721 is 1274333996.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4821774721 + 2171560000 = 69439^2 + 46600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6993334721 is a prime.

It is not a weakly prime, because it can be changed into another prime (6993334741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3496667360 + 3496667361.

It is an arithmetic number, because the mean of its divisors is an integer number (3496667361).

Almost surely, 2^6993334721 is an apocalyptic number.

It is an amenable number.

6993334721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6993334721 is an equidigital number, since it uses as much as digits as its factorization.

6993334721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 47.

The square root of 6993334721 is about 83626.1605061478. The cubic root of 6993334721 is about 1912.3238366281.

The spelling of 6993334721 in words is "six billion, nine hundred ninety-three million, three hundred thirty-four thousand, seven hundred twenty-one".