6651671717 has 2 divisors, whose sum is σ = 6651671718. Its totient is φ = 6651671716.

The previous prime is 6651671701. The next prime is 6651671771. The reversal of 6651671717 is 7171761566.

Together with next prime (6651671771) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6382252321 + 269419396 = 79889^2 + 16414^2 .

It is a cyclic number.

It is not a de Polignac number, because 6651671717 - 2⁴ = 6651671701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6651671317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3325835858 + 3325835859.

It is an arithmetic number, because the mean of its divisors is an integer number (3325835859).

Almost surely, 2^6651671717 is an apocalyptic number.

It is an amenable number.

6651671717 is a deficient number, since it is larger than the sum of its proper divisors (1).

6651671717 is an equidigital number, since it uses as much as digits as its factorization.

6651671717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 47.

The square root of 6651671717 is about 81557.7814619795. The cubic root of 6651671717 is about 1880.6599196965.

The spelling of 6651671717 in words is "six billion, six hundred fifty-one million, six hundred seventy-one thousand, seven hundred seventeen".