663645233 has 2 divisors, whose sum is σ = 663645234. Its totient is φ = 663645232.

The previous prime is 663645223. The next prime is 663645313. The reversal of 663645233 is 332546366.

663645233 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., 633428224 + 30217009 = 25168^2 + 5497^2 .

It is a cyclic number.

It is not a de Polignac number, because 663645233 - 2¹² = 663641137 is a prime.

It is not a weakly prime, because it can be changed into another prime (663645223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331822616 + 331822617.

It is an arithmetic number, because the mean of its divisors is an integer number (331822617).

Almost surely, 2^663645233 is an apocalyptic number.

It is an amenable number.

663645233 is a deficient number, since it is larger than the sum of its proper divisors (1).

663645233 is an equidigital number, since it uses as much as digits as its factorization.

663645233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 38.

The square root of 663645233 is about 25761.3127188814. The cubic root of 663645233 is about 872.2587332453.

The spelling of 663645233 in words is "six hundred sixty-three million, six hundred forty-five thousand, two hundred thirty-three".