66285811 has 2 divisors, whose sum is σ = 66285812. Its totient is φ = 66285810.

The previous prime is 66285809. The next prime is 66285827. The reversal of 66285811 is 11858266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66285811 - 2¹ = 66285809 is a prime.

Together with 66285809, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66285841) 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, 33142905 + 33142906.

It is an arithmetic number, because the mean of its divisors is an integer number (33142906).

Almost surely, 2^66285811 is an apocalyptic number.

66285811 is a deficient number, since it is larger than the sum of its proper divisors (1).

66285811 is an equidigital number, since it uses as much as digits as its factorization.

66285811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 37.

The square root of 66285811 is about 8141.6098530942. The cubic root of 66285811 is about 404.7065109389.

The spelling of 66285811 in words is "sixty-six million, two hundred eighty-five thousand, eight hundred eleven".