66806241911 has 2 divisors, whose sum is σ = 66806241912. Its totient is φ = 66806241910.

The previous prime is 66806241881. The next prime is 66806241913. The reversal of 66806241911 is 11914260866.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66806241911 - 2¹⁸ = 66805979767 is a prime.

Together with 66806241913, 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 (66806241913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33403120955 + 33403120956.

It is an arithmetic number, because the mean of its divisors is an integer number (33403120956).

Almost surely, 2^66806241911 is an apocalyptic number.

66806241911 is a deficient number, since it is larger than the sum of its proper divisors (1).

66806241911 is an equidigital number, since it uses as much as digits as its factorization.

66806241911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 66806241911 in words is "sixty-six billion, eight hundred six million, two hundred forty-one thousand, nine hundred eleven".