66871033 has 2 divisors, whose sum is σ = 66871034. Its totient is φ = 66871032.

The previous prime is 66871019. The next prime is 66871037. The reversal of 66871033 is 33017866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64834704 + 2036329 = 8052^2 + 1427^2 .

It is a cyclic number.

It is not a de Polignac number, because 66871033 - 2⁹ = 66870521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66871033.

It is not a weakly prime, because it can be changed into another prime (66871037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33435516 + 33435517.

It is an arithmetic number, because the mean of its divisors is an integer number (33435517).

Almost surely, 2^66871033 is an apocalyptic number.

It is an amenable number.

66871033 is a deficient number, since it is larger than the sum of its proper divisors (1).

66871033 is an equidigital number, since it uses as much as digits as its factorization.

66871033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 66871033 is about 8177.4710638436. The cubic root of 66871033 is about 405.8940428199.

Adding to 66871033 its reverse (33017866), we get a palindrome (99888899).

The spelling of 66871033 in words is "sixty-six million, eight hundred seventy-one thousand, thirty-three".