66706163 has 2 divisors, whose sum is σ = 66706164. Its totient is φ = 66706162.

The previous prime is 66706127. The next prime is 66706183. The reversal of 66706163 is 36160766.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66706163 - 2¹⁸ = 66444019 is a prime.

It is not a weakly prime, because it can be changed into another prime (66706183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33353081 + 33353082.

It is an arithmetic number, because the mean of its divisors is an integer number (33353082).

Almost surely, 2^66706163 is an apocalyptic number.

66706163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66706163 is an equidigital number, since it uses as much as digits as its factorization.

66706163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 66706163 is about 8167.3840977390. The cubic root of 66706163 is about 405.5601921226.

The spelling of 66706163 in words is "sixty-six million, seven hundred six thousand, one hundred sixty-three".