867663 has 24 divisors (see below), whose sum is σ = 1364688. Its totient is φ = 529152.

The previous prime is 867653. The next prime is 867677. The reversal of 867663 is 366768.

It is a happy number.

It is not a de Polignac number, because 867663 - 2⁵ = 867631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867623) 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 23 ways as a sum of consecutive naturals, for example, 8056 + ... + 8162.

It is an arithmetic number, because the mean of its divisors is an integer number (56862).

2⁸⁶⁷⁶⁶³ is an apocalyptic number.

867663 is a deficient number, since it is larger than the sum of its proper divisors (497025).

867663 is a wasteful number, since it uses less digits than its factorization.

867663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183 (or 180 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 867663 is about 931.4842993846. The cubic root of 867663 is about 95.3784717320.

The spelling of 867663 in words is "eight hundred sixty-seven thousand, six hundred sixty-three".