663388087 has 2 divisors, whose sum is σ = 663388088. Its totient is φ = 663388086.

The previous prime is 663388073. The next prime is 663388139. The reversal of 663388087 is 780883366.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-663388087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663388087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (663388027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331694043 + 331694044.

It is an arithmetic number, because the mean of its divisors is an integer number (331694044).

Almost surely, 2^663388087 is an apocalyptic number.

663388087 is a deficient number, since it is larger than the sum of its proper divisors (1).

663388087 is an equidigital number, since it uses as much as digits as its factorization.

663388087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1161216, while the sum is 49.

The square root of 663388087 is about 25756.3213017698. The cubic root of 663388087 is about 872.1460591793.

The spelling of 663388087 in words is "six hundred sixty-three million, three hundred eighty-eight thousand, eighty-seven".