663884987 has 2 divisors, whose sum is σ = 663884988. Its totient is φ = 663884986.

The previous prime is 663884983. The next prime is 663884993. The reversal of 663884987 is 789488366.

663884987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663884987 - 2² = 663884983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (663884981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331942493 + 331942494.

It is an arithmetic number, because the mean of its divisors is an integer number (331942494).

Almost surely, 2^663884987 is an apocalyptic number.

663884987 is a deficient number, since it is larger than the sum of its proper divisors (1).

663884987 is an equidigital number, since it uses as much as digits as its factorization.

663884987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13934592, while the sum is 59.

The square root of 663884987 is about 25765.9656717927. The cubic root of 663884987 is about 872.3637604151.

The spelling of 663884987 in words is "six hundred sixty-three million, eight hundred eighty-four thousand, nine hundred eighty-seven".