663936 has 128 divisors (see below), whose sum is σ = 2284800.
Its totient is φ = 165888.
The previous prime is 663907. The next prime is 663937. The reversal of 663936 is 639366.
663936 = T33 + T34 + ... +
It is a tau number, because it is divible by the number of its divisors (128).
It is a super-2 number, since 2×6639362 = 881622024192, which contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 663897 and 663906.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (663937) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34935 + ... + 34953.
It is an arithmetic number, because the mean of its divisors is an integer number (17850).
2663936 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 663936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142400).
663936 is an abundant number, since it is smaller than the sum of its proper divisors (1620864).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
663936 is a wasteful number, since it uses less digits than its factorization.
663936 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 56 (or 44 counting only the distinct ones).
The product of its digits is 17496, while the sum is 33.
The square root of 663936 is about 814.8226800967.
The cubic root of 663936 is about 87.2386104021.
The spelling of 663936 in words is "six hundred sixty-three thousand, nine hundred thirty-six".