663333563 has 2 divisors, whose sum is σ = 663333564. Its totient is φ = 663333562.

The previous prime is 663333527. The next prime is 663333569. The reversal of 663333563 is 365333366.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663333563 - 2¹⁰ = 663332539 is a prime.

It is a super-2 number, since 2×663333563² = 880022831604549938, which contains 22 as substring.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (663333569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331666781 + 331666782.

It is an arithmetic number, because the mean of its divisors is an integer number (331666782).

Almost surely, 2^663333563 is an apocalyptic number.

663333563 is a deficient number, since it is larger than the sum of its proper divisors (1).

663333563 is an equidigital number, since it uses as much as digits as its factorization.

663333563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 38.

The square root of 663333563 is about 25755.2628214119. The cubic root of 663333563 is about 872.1221645715.

It can be divided in two parts, 66333 and 3563, that added together give a palindrome (69896).

The spelling of 663333563 in words is "six hundred sixty-three million, three hundred thirty-three thousand, five hundred sixty-three".