66212711 has 2 divisors, whose sum is σ = 66212712. Its totient is φ = 66212710.

The previous prime is 66212681. The next prime is 66212737. The reversal of 66212711 is 11721266.

It is an a-pointer prime, because the next prime (66212737) can be obtained adding 66212711 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66212711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66212761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33106355 + 33106356.

It is an arithmetic number, because the mean of its divisors is an integer number (33106356).

Almost surely, 2^66212711 is an apocalyptic number.

66212711 is a deficient number, since it is larger than the sum of its proper divisors (1).

66212711 is an equidigital number, since it uses as much as digits as its factorization.

66212711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 66212711 is about 8137.1193305739. The cubic root of 66212711 is about 404.5576860885.

Adding to 66212711 its reverse (11721266), we get a palindrome (77933977).

The spelling of 66212711 in words is "sixty-six million, two hundred twelve thousand, seven hundred eleven".