66517163 has 2 divisors, whose sum is σ = 66517164. Its totient is φ = 66517162.

The previous prime is 66517159. The next prime is 66517177. The reversal of 66517163 is 36171566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66517163 - 2² = 66517159 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (66517123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33258581 + 33258582.

It is an arithmetic number, because the mean of its divisors is an integer number (33258582).

Almost surely, 2^66517163 is an apocalyptic number.

66517163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66517163 is an equidigital number, since it uses as much as digits as its factorization.

66517163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 35.

The square root of 66517163 is about 8155.8054783081. The cubic root of 66517163 is about 405.1768023466.

The spelling of 66517163 in words is "sixty-six million, five hundred seventeen thousand, one hundred sixty-three".