663627427 has 2 divisors, whose sum is σ = 663627428. Its totient is φ = 663627426.

The previous prime is 663627409. The next prime is 663627431. The reversal of 663627427 is 724726366.

It is a happy number.

663627427 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 a de Polignac number, because none of the positive numbers 2^k-663627427 is a prime.

It is not a weakly prime, because it can be changed into another prime (663627407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331813713 + 331813714.

It is an arithmetic number, because the mean of its divisors is an integer number (331813714).

Almost surely, 2^663627427 is an apocalyptic number.

663627427 is a deficient number, since it is larger than the sum of its proper divisors (1).

663627427 is an equidigital number, since it uses as much as digits as its factorization.

663627427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 43.

The square root of 663627427 is about 25760.9671208206. The cubic root of 663627427 is about 872.2509321004.

The spelling of 663627427 in words is "six hundred sixty-three million, six hundred twenty-seven thousand, four hundred twenty-seven".