660240403200 has 324 divisors, whose sum is σ = 2697725594928. Its totient is φ = 150912000000.

The previous prime is 660240403189. The next prime is 660240403241. The reversal of 660240403200 is 2304042066.

660240403200 is a `hidden beast` number, since 6 + 60 + 240 + 40 + 320 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 415551 + ... + 1221950.

Almost surely, 2^660240403200 is an apocalyptic number.

660240403200 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660240403200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1348862797464).

660240403200 is an abundant number, since it is smaller than the sum of its proper divisors (2037485191728).

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

660240403200 is a wasteful number, since it uses less digits than its factorization.

660240403200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637540 (or 1637518 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 660240403200 its reverse (2304042066), we get a palindrome (662544445266).

The spelling of 660240403200 in words is "six hundred sixty billion, two hundred forty million, four hundred three thousand, two hundred".