66703340189 has 2 divisors, whose sum is σ = 66703340190. Its totient is φ = 66703340188.

The previous prime is 66703340159. The next prime is 66703340201. The reversal of 66703340189 is 98104330766.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54829968964 + 11873371225 = 234158^2 + 108965^2 .

It is a cyclic number.

It is not a de Polignac number, because 66703340189 - 2³² = 62408372893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66703340159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33351670094 + 33351670095.

It is an arithmetic number, because the mean of its divisors is an integer number (33351670095).

Almost surely, 2^66703340189 is an apocalyptic number.

It is an amenable number.

66703340189 is a deficient number, since it is larger than the sum of its proper divisors (1).

66703340189 is an equidigital number, since it uses as much as digits as its factorization.

66703340189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 66703340189 in words is "sixty-six billion, seven hundred three million, three hundred forty thousand, one hundred eighty-nine".