2663721116171 has 2 divisors, whose sum is σ = 2663721116172. Its totient is φ = 2663721116170.

The previous prime is 2663721116107. The next prime is 2663721116201. The reversal of 2663721116171 is 1716111273662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2663721116171 - 2⁶ = 2663721116107 is a prime.

It is not a weakly prime, because it can be changed into another prime (2663721116471) 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, 1331860558085 + 1331860558086.

It is an arithmetic number, because the mean of its divisors is an integer number (1331860558086).

Almost surely, 2^{2663721116171} is an apocalyptic number.

2663721116171 is a deficient number, since it is larger than the sum of its proper divisors (1).

2663721116171 is an equidigital number, since it uses as much as digits as its factorization.

2663721116171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 44.

The spelling of 2663721116171 in words is "two trillion, six hundred sixty-three billion, seven hundred twenty-one million, one hundred sixteen thousand, one hundred seventy-one".