6718221047 has 2 divisors, whose sum is σ = 6718221048. Its totient is φ = 6718221046.

The previous prime is 6718221043. The next prime is 6718221053. The reversal of 6718221047 is 7401228176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6718221047 - 2² = 6718221043 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6718221047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6718221043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3359110523 + 3359110524.

It is an arithmetic number, because the mean of its divisors is an integer number (3359110524).

Almost surely, 2^6718221047 is an apocalyptic number.

6718221047 is a deficient number, since it is larger than the sum of its proper divisors (1).

6718221047 is an equidigital number, since it uses as much as digits as its factorization.

6718221047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 6718221047 is about 81964.7549072161. The cubic root of 6718221047 is about 1886.9110584651.

The spelling of 6718221047 in words is "six billion, seven hundred eighteen million, two hundred twenty-one thousand, forty-seven".