66601033 has 2 divisors, whose sum is σ = 66601034. Its totient is φ = 66601032.

The previous prime is 66601027. The next prime is 66601037. The reversal of 66601033 is 33010666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37785609 + 28815424 = 6147^2 + 5368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66601033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66600989 and 66601007.

It is not a weakly prime, because it can be changed into another prime (66601037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33300516 + 33300517.

It is an arithmetic number, because the mean of its divisors is an integer number (33300517).

Almost surely, 2^66601033 is an apocalyptic number.

It is an amenable number.

66601033 is a deficient number, since it is larger than the sum of its proper divisors (1).

66601033 is an equidigital number, since it uses as much as digits as its factorization.

66601033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 66601033 is about 8160.9455947212. The cubic root of 66601033 is about 405.3470236069.

Adding to 66601033 its reverse (33010666), we get a palindrome (99611699).

The spelling of 66601033 in words is "sixty-six million, six hundred one thousand, thirty-three".