66011711 has 2 divisors, whose sum is σ = 66011712. Its totient is φ = 66011710.

The previous prime is 66011657. The next prime is 66011713. The reversal of 66011711 is 11711066.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66011711 - 2¹⁴ = 65995327 is a prime.

Together with 66011713, 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 (66011713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33005855 + 33005856.

It is an arithmetic number, because the mean of its divisors is an integer number (33005856).

Almost surely, 2^66011711 is an apocalyptic number.

66011711 is a deficient number, since it is larger than the sum of its proper divisors (1).

66011711 is an equidigital number, since it uses as much as digits as its factorization.

66011711 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 66011711 is about 8124.7591348913. The cubic root of 66011711 is about 404.1479031546.

Adding to 66011711 its reverse (11711066), we get a palindrome (77722777).

The spelling of 66011711 in words is "sixty-six million, eleven thousand, seven hundred eleven".