63663320 has 64 divisors (see below), whose sum is σ = 164505600. Its totient is φ = 21720960.

The previous prime is 63663293. The next prime is 63663337. The reversal of 63663320 is 2336636.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75461 + ... + 76299.

It is an arithmetic number, because the mean of its divisors is an integer number (2570400).

Almost surely, 2^63663320 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 63663320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82252800).

63663320 is an abundant number, since it is smaller than the sum of its proper divisors (100842280).

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

63663320 is a wasteful number, since it uses less digits than its factorization.

63663320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 29.

The square root of 63663320 is about 7978.9297527927. The cubic root of 63663320 is about 399.2973497627.

Adding to 63663320 its reverse (2336636), we get a palindrome (65999956).

The spelling of 63663320 in words is "sixty-three million, six hundred sixty-three thousand, three hundred twenty".