66214111 has 2 divisors, whose sum is σ = 66214112. Its totient is φ = 66214110.

The previous prime is 66214091. The next prime is 66214129. The reversal of 66214111 is 11141266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66214111 - 2¹⁹ = 65689823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66211111) 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, 33107055 + 33107056.

It is an arithmetic number, because the mean of its divisors is an integer number (33107056).

Almost surely, 2^66214111 is an apocalyptic number.

66214111 is a deficient number, since it is larger than the sum of its proper divisors (1).

66214111 is an equidigital number, since it uses as much as digits as its factorization.

66214111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 22.

The square root of 66214111 is about 8137.2053556488. The cubic root of 66214111 is about 404.5605373878.

Adding to 66214111 its reverse (11141266), we get a palindrome (77355377).

The spelling of 66214111 in words is "sixty-six million, two hundred fourteen thousand, one hundred eleven".