66498163 has 2 divisors, whose sum is σ = 66498164. Its totient is φ = 66498162.

The previous prime is 66498161. The next prime is 66498191. The reversal of 66498163 is 36189466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66498163 - 2¹ = 66498161 is a prime.

Together with 66498161, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66498161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33249081 + 33249082.

It is an arithmetic number, because the mean of its divisors is an integer number (33249082).

Almost surely, 2^66498163 is an apocalyptic number.

66498163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66498163 is an equidigital number, since it uses as much as digits as its factorization.

66498163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 43.

The square root of 66498163 is about 8154.6405806755. The cubic root of 66498163 is about 405.1382203626.

The spelling of 66498163 in words is "sixty-six million, four hundred ninety-eight thousand, one hundred sixty-three".