663420341 has 2 divisors, whose sum is σ = 663420342. Its totient is φ = 663420340.

The previous prime is 663420337. The next prime is 663420343. The reversal of 663420341 is 143024366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 446476900 + 216943441 = 21130^2 + 14729^2 .

It is a cyclic number.

It is not a de Polignac number, because 663420341 - 2² = 663420337 is a prime.

Together with 663420343, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663420343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331710170 + 331710171.

It is an arithmetic number, because the mean of its divisors is an integer number (331710171).

Almost surely, 2^663420341 is an apocalyptic number.

It is an amenable number.

663420341 is a deficient number, since it is larger than the sum of its proper divisors (1).

663420341 is an equidigital number, since it uses as much as digits as its factorization.

663420341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 663420341 is about 25756.9474317125. The cubic root of 663420341 is about 872.1601935619.

The spelling of 663420341 in words is "six hundred sixty-three million, four hundred twenty thousand, three hundred forty-one".