66597163 has 2 divisors, whose sum is σ = 66597164. Its totient is φ = 66597162.

The previous prime is 66597133. The next prime is 66597169. The reversal of 66597163 is 36179566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66597163 - 2⁵ = 66597131 is a prime.

It is not a weakly prime, because it can be changed into another prime (66597169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33298581 + 33298582.

It is an arithmetic number, because the mean of its divisors is an integer number (33298582).

Almost surely, 2^66597163 is an apocalyptic number.

66597163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66597163 is an equidigital number, since it uses as much as digits as its factorization.

66597163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 43.

The square root of 66597163 is about 8160.7084863999. The cubic root of 66597163 is about 405.3391722604.

The spelling of 66597163 in words is "sixty-six million, five hundred ninety-seven thousand, one hundred sixty-three".