663356389 has 2 divisors, whose sum is σ = 663356390. Its totient is φ = 663356388.

The previous prime is 663356381. The next prime is 663356413. The reversal of 663356389 is 983653366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 575184289 + 88172100 = 23983^2 + 9390^2 .

It is a cyclic number.

It is not a de Polignac number, because 663356389 - 2³ = 663356381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663356381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331678194 + 331678195.

It is an arithmetic number, because the mean of its divisors is an integer number (331678195).

Almost surely, 2^663356389 is an apocalyptic number.

It is an amenable number.

663356389 is a deficient number, since it is larger than the sum of its proper divisors (1).

663356389 is an equidigital number, since it uses as much as digits as its factorization.

663356389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 49.

The square root of 663356389 is about 25755.7059503326. The cubic root of 663356389 is about 872.1321680013.

The spelling of 663356389 in words is "six hundred sixty-three million, three hundred fifty-six thousand, three hundred eighty-nine".