66559039 has 2 divisors, whose sum is σ = 66559040. Its totient is φ = 66559038.

The previous prime is 66559037. The next prime is 66559057. The reversal of 66559039 is 93095566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66559039 - 2¹ = 66559037 is a prime.

Together with 66559037, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 66558986 and 66559004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66559037) 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, 33279519 + 33279520.

It is an arithmetic number, because the mean of its divisors is an integer number (33279520).

Almost surely, 2^66559039 is an apocalyptic number.

66559039 is a deficient number, since it is larger than the sum of its proper divisors (1).

66559039 is an equidigital number, since it uses as much as digits as its factorization.

66559039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 218700, while the sum is 43.

The square root of 66559039 is about 8158.3723254090. The cubic root of 66559039 is about 405.2618111056.

The spelling of 66559039 in words is "sixty-six million, five hundred fifty-nine thousand, thirty-nine".