663324400 has 30 divisors (see below), whose sum is σ = 1593637832. Its totient is φ = 265329600.

The previous prime is 663324383. The next prime is 663324401. The reversal of 663324400 is 4423366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663324401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 828756 + ... + 829555.

Almost surely, 2^663324400 is an apocalyptic number.

It is an amenable number.

663324400 is an abundant number, since it is smaller than the sum of its proper divisors (930313432).

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

663324400 is a wasteful number, since it uses less digits than its factorization.

663324400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658329 (or 1658318 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 28.

The square root of 663324400 is about 25755.0849348240. The cubic root of 663324400 is about 872.1181488481.

Adding to 663324400 its reverse (4423366), we get a palindrome (667747766).

The spelling of 663324400 in words is "six hundred sixty-three million, three hundred twenty-four thousand, four hundred".