66245339 has 2 divisors, whose sum is σ = 66245340. Its totient is φ = 66245338.

The previous prime is 66245317. The next prime is 66245363. The reversal of 66245339 is 93354266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66245339 - 2¹⁶ = 66179803 is a prime.

It is a Chen prime.

It is equal to p_3909845 and since 66245339 and 3909845 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (66245369) 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, 33122669 + 33122670.

It is an arithmetic number, because the mean of its divisors is an integer number (33122670).

Almost surely, 2^66245339 is an apocalyptic number.

66245339 is a deficient number, since it is larger than the sum of its proper divisors (1).

66245339 is an equidigital number, since it uses as much as digits as its factorization.

66245339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 38.

The square root of 66245339 is about 8139.1239700597. The cubic root of 66245339 is about 404.6241272112.

The spelling of 66245339 in words is "sixty-six million, two hundred forty-five thousand, three hundred thirty-nine".