66233633 has 2 divisors, whose sum is σ = 66233634. Its totient is φ = 66233632.

The previous prime is 66233627. The next prime is 66233641. The reversal of 66233633 is 33633266.

66233633 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52896529 + 13337104 = 7273^2 + 3652^2 .

It is a cyclic number.

It is not a de Polignac number, because 66233633 - 2¹⁸ = 65971489 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 66233633.

It is not a weakly prime, because it can be changed into another prime (66233693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33116816 + 33116817.

It is an arithmetic number, because the mean of its divisors is an integer number (33116817).

Almost surely, 2^66233633 is an apocalyptic number.

It is an amenable number.

66233633 is a deficient number, since it is larger than the sum of its proper divisors (1).

66233633 is an equidigital number, since it uses as much as digits as its factorization.

66233633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 32.

The square root of 66233633 is about 8138.4048191276. The cubic root of 66233633 is about 404.6002925328.

Adding to 66233633 its reverse (33633266), we get a palindrome (99866899).

It can be divided in two parts, 66233 and 633, that added together give a palindrome (66866).

The spelling of 66233633 in words is "sixty-six million, two hundred thirty-three thousand, six hundred thirty-three".