66716711 has 2 divisors, whose sum is σ = 66716712. Its totient is φ = 66716710.

The previous prime is 66716707. The next prime is 66716719. The reversal of 66716711 is 11761766.

66716711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66716711 - 2² = 66716707 is a prime.

It is a super-2 number, since 2×66716711² = 8902239053315042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66716719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33358355 + 33358356.

It is an arithmetic number, because the mean of its divisors is an integer number (33358356).

Almost surely, 2^66716711 is an apocalyptic number.

66716711 is a deficient number, since it is larger than the sum of its proper divisors (1).

66716711 is an equidigital number, since it uses as much as digits as its factorization.

66716711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 35.

The square root of 66716711 is about 8168.0298114050. The cubic root of 66716711 is about 405.5815675760.

The spelling of 66716711 in words is "sixty-six million, seven hundred sixteen thousand, seven hundred eleven".