663843320 has 64 divisors (see below), whose sum is σ = 1728691200. Its totient is φ = 224714880.

The previous prime is 663843283. The next prime is 663843371. The reversal of 663843320 is 23348366.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (35).

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, 7115 + ... + 37125.

It is an arithmetic number, because the mean of its divisors is an integer number (27010800).

Almost surely, 2^663843320 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 663843320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864345600).

663843320 is an abundant number, since it is smaller than the sum of its proper divisors (1064847880).

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

663843320 is a wasteful number, since it uses less digits than its factorization.

663843320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30108 (or 30104 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The square root of 663843320 is about 25765.1570924767. The cubic root of 663843320 is about 872.3455094921.

The spelling of 663843320 in words is "six hundred sixty-three million, eight hundred forty-three thousand, three hundred twenty".