66055015289 has 2 divisors, whose sum is σ = 66055015290. Its totient is φ = 66055015288.

The previous prime is 66055015267. The next prime is 66055015409. The reversal of 66055015289 is 98251055066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53299571689 + 12755443600 = 230867^2 + 112940^2 .

It is a cyclic number.

It is not a de Polignac number, because 66055015289 - 2²⁴ = 66038238073 is a prime.

It is not a weakly prime, because it can be changed into another prime (66055015259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33027507644 + 33027507645.

It is an arithmetic number, because the mean of its divisors is an integer number (33027507645).

Almost surely, 2^66055015289 is an apocalyptic number.

It is an amenable number.

66055015289 is a deficient number, since it is larger than the sum of its proper divisors (1).

66055015289 is an equidigital number, since it uses as much as digits as its factorization.

66055015289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 66055015289 in words is "sixty-six billion, fifty-five million, fifteen thousand, two hundred eighty-nine".