665016259200 has 768 divisors, whose sum is σ = 2368069862400. Its totient is φ = 163612753920.

The previous prime is 665016259189. The next prime is 665016259241. The reversal of 665016259200 is 2952610566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 845001207 + ... + 845001993.

It is an arithmetic number, because the mean of its divisors is an integer number (3083424300).

Almost surely, 2^665016259200 is an apocalyptic number.

665016259200 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 665016259200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184034931200).

665016259200 is an abundant number, since it is smaller than the sum of its proper divisors (1703053603200).

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

665016259200 is a wasteful number, since it uses less digits than its factorization.

665016259200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969 (or 952 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

Adding to 665016259200 its reverse (2952610566), we get a palindrome (667968869766).

The spelling of 665016259200 in words is "six hundred sixty-five billion, sixteen million, two hundred fifty-nine thousand, two hundred".