66063149969 has 2 divisors, whose sum is σ = 66063149970. Its totient is φ = 66063149968.

The previous prime is 66063149953. The next prime is 66063150011. The reversal of 66063149969 is 96994136066.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47814382225 + 18248767744 = 218665^2 + 135088^2 .

It is a cyclic number.

It is not a de Polignac number, because 66063149969 - 2⁴ = 66063149953 is a prime.

It is a super-2 number, since 2×66063149969² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66063149909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33031574984 + 33031574985.

It is an arithmetic number, because the mean of its divisors is an integer number (33031574985).

Almost surely, 2^66063149969 is an apocalyptic number.

It is an amenable number.

66063149969 is a deficient number, since it is larger than the sum of its proper divisors (1).

66063149969 is an equidigital number, since it uses as much as digits as its factorization.

66063149969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11337408, while the sum is 59.

The spelling of 66063149969 in words is "sixty-six billion, sixty-three million, one hundred forty-nine thousand, nine hundred sixty-nine".