66631885301 has 2 divisors, whose sum is σ = 66631885302. Its totient is φ = 66631885300.

The previous prime is 66631885267. The next prime is 66631885319. The reversal of 66631885301 is 10358813666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64203958225 + 2427927076 = 253385^2 + 49274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66631885301 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66631885501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33315942650 + 33315942651.

It is an arithmetic number, because the mean of its divisors is an integer number (33315942651).

Almost surely, 2^66631885301 is an apocalyptic number.

It is an amenable number.

66631885301 is a deficient number, since it is larger than the sum of its proper divisors (1).

66631885301 is an equidigital number, since it uses as much as digits as its factorization.

66631885301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 66631885301 in words is "sixty-six billion, six hundred thirty-one million, eight hundred eighty-five thousand, three hundred one".