66733868570111 has 2 divisors, whose sum is σ = 66733868570112. Its totient is φ = 66733868570110.

The previous prime is 66733868570107. The next prime is 66733868570113. The reversal of 66733868570111 is 11107586833766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66733868570111 - 2² = 66733868570107 is a prime.

It is a Sophie Germain prime.

Together with 66733868570113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66733868570113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33366934285055 + 33366934285056.

It is an arithmetic number, because the mean of its divisors is an integer number (33366934285056).

Almost surely, 2^{66733868570111} is an apocalyptic number.

66733868570111 is a deficient number, since it is larger than the sum of its proper divisors (1).

66733868570111 is an equidigital number, since it uses as much as digits as its factorization.

66733868570111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 62.

The spelling of 66733868570111 in words is "sixty-six trillion, seven hundred thirty-three billion, eight hundred sixty-eight million, five hundred seventy thousand, one hundred eleven".