663498 has 32 divisors (see below), whose sum is σ = 1609920. Its totient is φ = 200880.

The previous prime is 663463. The next prime is 663517. The reversal of 663498 is 894366.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663498.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36 + ... + 1152.

It is an arithmetic number, because the mean of its divisors is an integer number (50310).

663498 is a Friedman number, since it can be written as 9*(8^4*6*3-6), using all its digits and the basic arithmetic operations.

2⁶⁶³⁴⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663498, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (804960).

663498 is an abundant number, since it is smaller than the sum of its proper divisors (946422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663498 is a wasteful number, since it uses less digits than its factorization.

663498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1133 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 663498 is about 814.5538656222. The cubic root of 663498 is about 87.2194223493.

It can be divided in two parts, 6 and 63498, that added together give a square (63504 = 252²).

The spelling of 663498 in words is "six hundred sixty-three thousand, four hundred ninety-eight".