663633413 has 2 divisors, whose sum is σ = 663633414. Its totient is φ = 663633412.

The previous prime is 663633409. The next prime is 663633431. The reversal of 663633413 is 314336366.

663633413 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with next prime (663633431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 659565124 + 4068289 = 25682^2 + 2017^2 .

It is a cyclic number.

It is not a de Polignac number, because 663633413 - 2² = 663633409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663633493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331816706 + 331816707.

It is an arithmetic number, because the mean of its divisors is an integer number (331816707).

Almost surely, 2^663633413 is an apocalyptic number.

It is an amenable number.

663633413 is a deficient number, since it is larger than the sum of its proper divisors (1).

663633413 is an equidigital number, since it uses as much as digits as its factorization.

663633413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 35.

The square root of 663633413 is about 25761.0833040849. The cubic root of 663633413 is about 872.2535546957.

Adding to 663633413 its reverse (314336366), we get a palindrome (977969779).

The spelling of 663633413 in words is "six hundred sixty-three million, six hundred thirty-three thousand, four hundred thirteen".