663587 has 2 divisors, whose sum is σ = 663588. Its totient is φ = 663586.

The previous prime is 663583. The next prime is 663589. The reversal of 663587 is 785366.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 663587 - 2² = 663583 is a prime.

Together with 663589, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (663581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331793 + 331794.

It is an arithmetic number, because the mean of its divisors is an integer number (331794).

663587 is a Friedman number, since it can be written as 6*(8*6)^3+7*5, using all its digits and the basic arithmetic operations.

2⁶⁶³⁵⁸⁷ is an apocalyptic number.

663587 is a deficient number, since it is larger than the sum of its proper divisors (1).

663587 is an equidigital number, since it uses as much as digits as its factorization.

663587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 663587 is about 814.6084949226. The cubic root of 663587 is about 87.2233219750.

The spelling of 663587 in words is "six hundred sixty-three thousand, five hundred eighty-seven".