660566171 has 2 divisors, whose sum is σ = 660566172. Its totient is φ = 660566170.

The previous prime is 660566167. The next prime is 660566191. The reversal of 660566171 is 171665066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 660566171 - 2² = 660566167 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (660566191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330283085 + 330283086.

It is an arithmetic number, because the mean of its divisors is an integer number (330283086).

Almost surely, 2^660566171 is an apocalyptic number.

660566171 is a deficient number, since it is larger than the sum of its proper divisors (1).

660566171 is an equidigital number, since it uses as much as digits as its factorization.

660566171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 660566171 is about 25701.4818833467. The cubic root of 660566171 is about 870.9076584400.

It can be divided in two parts, 66056 and 6171, that added together give a palindrome (72227).

The spelling of 660566171 in words is "six hundred sixty million, five hundred sixty-six thousand, one hundred seventy-one".