66140033 has 2 divisors, whose sum is σ = 66140034. Its totient is φ = 66140032.

The previous prime is 66140027. The next prime is 66140069. The reversal of 66140033 is 33004166.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66129424 + 10609 = 8132^2 + 103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66140033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 66139990 and 66140008.

It is not a weakly prime, because it can be changed into another prime (66140533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33070016 + 33070017.

It is an arithmetic number, because the mean of its divisors is an integer number (33070017).

Almost surely, 2^66140033 is an apocalyptic number.

It is an amenable number.

66140033 is a deficient number, since it is larger than the sum of its proper divisors (1).

66140033 is an equidigital number, since it uses as much as digits as its factorization.

66140033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 66140033 is about 8132.6522733977. The cubic root of 66140033 is about 404.4096117614.

Adding to 66140033 its reverse (33004166), we get a palindrome (99144199).

The spelling of 66140033 in words is "sixty-six million, one hundred forty thousand, thirty-three".