66771059 has 2 divisors, whose sum is σ = 66771060. Its totient is φ = 66771058.

The previous prime is 66771031. The next prime is 66771091. The reversal of 66771059 is 95017766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66771059 - 2²⁴ = 49993843 is a prime.

It is not a weakly prime, because it can be changed into another prime (66771559) 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, 33385529 + 33385530.

It is an arithmetic number, because the mean of its divisors is an integer number (33385530).

Almost surely, 2^66771059 is an apocalyptic number.

66771059 is a deficient number, since it is larger than the sum of its proper divisors (1).

66771059 is an equidigital number, since it uses as much as digits as its factorization.

66771059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 66771059 is about 8171.3560074201. The cubic root of 66771059 is about 405.6916677496.

The spelling of 66771059 in words is "sixty-six million, seven hundred seventy-one thousand, fifty-nine".