663522 has 8 divisors (see below), whose sum is σ = 1327056. Its totient is φ = 221172.

The previous prime is 663517. The next prime is 663529. The reversal of 663522 is 225366.

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

663522 is an admirable number.

It is a super-2 number, since 2×663522² = 880522888968, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6 + 6 + 5⁷ + 3¹⁰ + 2¹¹ + 2¹⁹ .

It is a junction number, because it is equal to n+sod(n) for n = 663492 and 663501.

It is not an unprimeable number, because it can be changed into a prime (663529) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 55288 + ... + 55299.

It is an arithmetic number, because the mean of its divisors is an integer number (165882).

2⁶⁶³⁵²² is an apocalyptic number.

663522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

663522 is a wasteful number, since it uses less digits than its factorization.

663522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110592.

The product of its digits is 2160, while the sum is 24.

The square root of 663522 is about 814.5685974797. The cubic root of 663522 is about 87.2204739681.

Adding to 663522 its reverse (225366), we get a palindrome (888888).

The spelling of 663522 in words is "six hundred sixty-three thousand, five hundred twenty-two".