663402 has 8 divisors (see below), whose sum is σ = 1326816. Its totient is φ = 221132.

The previous prime is 663371. The next prime is 663407. The reversal of 663402 is 204366.

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

663402 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (663407) 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, 55278 + ... + 55289.

It is an arithmetic number, because the mean of its divisors is an integer number (165852).

2⁶⁶³⁴⁰² is an apocalyptic number.

663402 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.

663402 is a wasteful number, since it uses less digits than its factorization.

663402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110572.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 663402 is about 814.4949355275. The cubic root of 663402 is about 87.2152156205.

Adding to 663402 its reverse (204366), we get a palindrome (867768).

The spelling of 663402 in words is "six hundred sixty-three thousand, four hundred two".