66071204189 has 2 divisors, whose sum is σ = 66071204190. Its totient is φ = 66071204188.

The previous prime is 66071204161. The next prime is 66071204237. The reversal of 66071204189 is 98140217066.

66071204189 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., 63340305625 + 2730898564 = 251675^2 + 52258^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66071204189 is a prime.

It is a super-2 number, since 2×66071204189² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66071204989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33035602094 + 33035602095.

It is an arithmetic number, because the mean of its divisors is an integer number (33035602095).

Almost surely, 2^66071204189 is an apocalyptic number.

It is an amenable number.

66071204189 is a deficient number, since it is larger than the sum of its proper divisors (1).

66071204189 is an equidigital number, since it uses as much as digits as its factorization.

66071204189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 66071204189 in words is "sixty-six billion, seventy-one million, two hundred four thousand, one hundred eighty-nine".