66353165629 has 2 divisors, whose sum is σ = 66353165630. Its totient is φ = 66353165628.

The previous prime is 66353165621. The next prime is 66353165729. The reversal of 66353165629 is 92656135366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66154412025 + 198753604 = 257205^2 + 14098^2 .

It is a cyclic number.

It is not a de Polignac number, because 66353165629 - 2³ = 66353165621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66353165621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33176582814 + 33176582815.

It is an arithmetic number, because the mean of its divisors is an integer number (33176582815).

Almost surely, 2^66353165629 is an apocalyptic number.

It is an amenable number.

66353165629 is a deficient number, since it is larger than the sum of its proper divisors (1).

66353165629 is an equidigital number, since it uses as much as digits as its factorization.

66353165629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5248800, while the sum is 52.

The spelling of 66353165629 in words is "sixty-six billion, three hundred fifty-three million, one hundred sixty-five thousand, six hundred twenty-nine".