66240040589 has 2 divisors, whose sum is σ = 66240040590. Its totient is φ = 66240040588.

The previous prime is 66240040577. The next prime is 66240040667. The reversal of 66240040589 is 98504004266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45489638089 + 20750402500 = 213283^2 + 144050^2 .

It is a cyclic number.

It is not a de Polignac number, because 66240040589 - 2²⁰ = 66238992013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66240046589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33120020294 + 33120020295.

It is an arithmetic number, because the mean of its divisors is an integer number (33120020295).

Almost surely, 2^66240040589 is an apocalyptic number.

It is an amenable number.

66240040589 is a deficient number, since it is larger than the sum of its proper divisors (1).

66240040589 is an equidigital number, since it uses as much as digits as its factorization.

66240040589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 66240040589 in words is "sixty-six billion, two hundred forty million, forty thousand, five hundred eighty-nine".