6641760661171 has 2 divisors, whose sum is σ = 6641760661172. Its totient is φ = 6641760661170.

The previous prime is 6641760661163. The next prime is 6641760661201. The reversal of 6641760661171 is 1711660671466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6641760661171 - 2³ = 6641760661163 is a prime.

It is a super-2 number, since 2×6641760661171² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6641760661871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3320880330585 + 3320880330586.

It is an arithmetic number, because the mean of its divisors is an integer number (3320880330586).

Almost surely, 2^{6641760661171} is an apocalyptic number.

6641760661171 is a deficient number, since it is larger than the sum of its proper divisors (1).

6641760661171 is an equidigital number, since it uses as much as digits as its factorization.

6641760661171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 6641760661171 in words is "six trillion, six hundred forty-one billion, seven hundred sixty million, six hundred sixty-one thousand, one hundred seventy-one".