663716427 has 16 divisors (see below), whose sum is σ = 970807680. Its totient is φ = 400001600.

The previous prime is 663716419. The next prime is 663716441. The reversal of 663716427 is 724617366.

It is a happy number.

663716427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 663716427 - 2³ = 663716419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (663716927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50274 + ... + 62087.

It is an arithmetic number, because the mean of its divisors is an integer number (60675480).

Almost surely, 2^663716427 is an apocalyptic number.

663716427 is a deficient number, since it is larger than the sum of its proper divisors (307091253).

663716427 is a wasteful number, since it uses less digits than its factorization.

663716427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112554.

The product of its digits is 254016, while the sum is 42.

The square root of 663716427 is about 25762.6944825265. The cubic root of 663716427 is about 872.2899232872.

The spelling of 663716427 in words is "six hundred sixty-three million, seven hundred sixteen thousand, four hundred twenty-seven".