66265189 has 2 divisors, whose sum is σ = 66265190. Its totient is φ = 66265188.

The previous prime is 66265163. The next prime is 66265219. The reversal of 66265189 is 98156266.

66265189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65529025 + 736164 = 8095^2 + 858^2 .

It is a cyclic number.

It is not a de Polignac number, because 66265189 - 2²⁵ = 32710757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66265889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33132594 + 33132595.

It is an arithmetic number, because the mean of its divisors is an integer number (33132595).

Almost surely, 2^66265189 is an apocalyptic number.

It is an amenable number.

66265189 is a deficient number, since it is larger than the sum of its proper divisors (1).

66265189 is an equidigital number, since it uses as much as digits as its factorization.

66265189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 66265189 is about 8140.3432974292. The cubic root of 66265189 is about 404.6645375352.

The spelling of 66265189 in words is "sixty-six million, two hundred sixty-five thousand, one hundred eighty-nine".