663342 has 8 divisors (see below), whose sum is σ = 1326696. Its totient is φ = 221112.

The previous prime is 663331. The next prime is 663349. The reversal of 663342 is 243366.

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

663342 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a d-powerful number, because it can be written as 6³ + 6⁶ + 3¹¹ + 3¹¹ + 4⁹ + 2⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663349) by changing a digit.

663342 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 55273 + ... + 55284.

It is an arithmetic number, because the mean of its divisors is an integer number (165837).

2⁶⁶³³⁴² is an apocalyptic number.

663342 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.

663342 is a wasteful number, since it uses less digits than its factorization.

663342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110562.

The product of its digits is 2592, while the sum is 24.

The square root of 663342 is about 814.4581020531. The cubic root of 663342 is about 87.2125862090.

Adding to 663342 its sum of digits (24), we get a palindrome (663366).

The spelling of 663342 in words is "six hundred sixty-three thousand, three hundred forty-two".