663343643 has 2 divisors, whose sum is σ = 663343644. Its totient is φ = 663343642.

The previous prime is 663343631. The next prime is 663343649. The reversal of 663343643 is 346343366.

It is a happy number.

663343643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663343643 - 2⁶ = 663343579 is a prime.

It is a super-2 number, since 2×663343643² = 880049577417022898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663343597 and 663343606.

It is not a weakly prime, because it can be changed into another prime (663343649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331671821 + 331671822.

It is an arithmetic number, because the mean of its divisors is an integer number (331671822).

Almost surely, 2^663343643 is an apocalyptic number.

663343643 is a deficient number, since it is larger than the sum of its proper divisors (1).

663343643 is an equidigital number, since it uses as much as digits as its factorization.

663343643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 279936, while the sum is 38.

The square root of 663343643 is about 25755.4585088288. The cubic root of 663343643 is about 872.1265821312.

The spelling of 663343643 in words is "six hundred sixty-three million, three hundred forty-three thousand, six hundred forty-three".