66415163 has 2 divisors, whose sum is σ = 66415164. Its totient is φ = 66415162.

The previous prime is 66415159. The next prime is 66415169. The reversal of 66415163 is 36151466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66415163 - 2² = 66415159 is a prime.

It is not a weakly prime, because it can be changed into another prime (66415169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33207581 + 33207582.

It is an arithmetic number, because the mean of its divisors is an integer number (33207582).

Almost surely, 2^66415163 is an apocalyptic number.

66415163 is a deficient number, since it is larger than the sum of its proper divisors (1).

66415163 is an equidigital number, since it uses as much as digits as its factorization.

66415163 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 66415163 is about 8149.5498648698. The cubic root of 66415163 is about 404.9695917829.

The spelling of 66415163 in words is "sixty-six million, four hundred fifteen thousand, one hundred sixty-three".