663187 has 8 divisors (see below), whose sum is σ = 802656. Its totient is φ = 534912.

The previous prime is 663167. The next prime is 663191. The reversal of 663187 is 781366.

663187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 663187 - 2¹¹ = 661139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2668 + ... + 2905.

It is an arithmetic number, because the mean of its divisors is an integer number (100332).

2⁶⁶³¹⁸⁷ is an apocalyptic number.

663187 is a deficient number, since it is larger than the sum of its proper divisors (139469).

663187 is a wasteful number, since it uses less digits than its factorization.

663187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5597.

The product of its digits is 6048, while the sum is 31.

The square root of 663187 is about 814.3629412001. The cubic root of 663187 is about 87.2057928284.

The spelling of 663187 in words is "six hundred sixty-three thousand, one hundred eighty-seven".