663287 has 4 divisors (see below), whose sum is σ = 665520. Its totient is φ = 661056.

The previous prime is 663283. The next prime is 663301. The reversal of 663287 is 782366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 663287 - 2² = 663283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 587 + ... + 1292.

It is an arithmetic number, because the mean of its divisors is an integer number (166380).

2⁶⁶³²⁸⁷ is an apocalyptic number.

663287 is a deficient number, since it is larger than the sum of its proper divisors (2233).

663287 is a wasteful number, since it uses less digits than its factorization.

663287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232.

The product of its digits is 12096, while the sum is 32.

The square root of 663287 is about 814.4243365715. The cubic root of 663287 is about 87.2101757757.

The spelling of 663287 in words is "six hundred sixty-three thousand, two hundred eighty-seven".