66213354089 has 2 divisors, whose sum is σ = 66213354090. Its totient is φ = 66213354088.

The previous prime is 66213354071. The next prime is 66213354127. The reversal of 66213354089 is 98045331266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65456664025 + 756690064 = 255845^2 + 27508^2 .

It is a cyclic number.

It is not a de Polignac number, because 66213354089 - 2¹⁶ = 66213288553 is a prime.

It is not a weakly prime, because it can be changed into another prime (66213354289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33106677044 + 33106677045.

It is an arithmetic number, because the mean of its divisors is an integer number (33106677045).

Almost surely, 2^66213354089 is an apocalyptic number.

It is an amenable number.

66213354089 is a deficient number, since it is larger than the sum of its proper divisors (1).

66213354089 is an equidigital number, since it uses as much as digits as its factorization.

66213354089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 66213354089 in words is "sixty-six billion, two hundred thirteen million, three hundred fifty-four thousand, eighty-nine".