654663 has 8 divisors (see below), whose sum is σ = 891648. Its totient is φ = 427064.

The previous prime is 654629. The next prime is 654671. The reversal of 654663 is 366456.

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

It is a cyclic number.

It is not a de Polignac number, because 654663 - 2¹² = 650567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 654663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654613) 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 7 ways as a sum of consecutive naturals, for example, 2181 + ... + 2462.

It is an arithmetic number, because the mean of its divisors is an integer number (111456).

2⁶⁵⁴⁶⁶³ is an apocalyptic number.

654663 is a deficient number, since it is larger than the sum of its proper divisors (236985).

654663 is a wasteful number, since it uses less digits than its factorization.

654663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693.

The product of its digits is 12960, while the sum is 30.

The square root of 654663 is about 809.1124767299. The cubic root of 654663 is about 86.8305593659.

The spelling of 654663 in words is "six hundred fifty-four thousand, six hundred sixty-three".