663420343 has 2 divisors, whose sum is σ = 663420344. Its totient is φ = 663420342.

The previous prime is 663420341. The next prime is 663420377. The reversal of 663420343 is 343024366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663420343 - 2¹ = 663420341 is a prime.

Together with 663420341, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663420341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331710171 + 331710172.

It is an arithmetic number, because the mean of its divisors is an integer number (331710172).

Almost surely, 2^663420343 is an apocalyptic number.

663420343 is a deficient number, since it is larger than the sum of its proper divisors (1).

663420343 is an equidigital number, since it uses as much as digits as its factorization.

663420343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 31.

The square root of 663420343 is about 25756.9474705370. The cubic root of 663420343 is about 872.1601944383.

The spelling of 663420343 in words is "six hundred sixty-three million, four hundred twenty thousand, three hundred forty-three".