66011131206191 has 2 divisors, whose sum is σ = 66011131206192. Its totient is φ = 66011131206190.

The previous prime is 66011131206133. The next prime is 66011131206193. The reversal of 66011131206191 is 19160213111066.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66011131206191 - 2¹⁴ = 66011131189807 is a prime.

Together with 66011131206193, 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 (66011131206193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33005565603095 + 33005565603096.

It is an arithmetic number, because the mean of its divisors is an integer number (33005565603096).

Almost surely, 2^{66011131206191} is an apocalyptic number.

66011131206191 is a deficient number, since it is larger than the sum of its proper divisors (1).

66011131206191 is an equidigital number, since it uses as much as digits as its factorization.

66011131206191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 38.

The spelling of 66011131206191 in words is "sixty-six trillion, eleven billion, one hundred thirty-one million, two hundred six thousand, one hundred ninety-one".