665212676887200 has 576 divisors, whose sum is σ = 2353103511736320. Its totient is φ = 162253738967040.

The previous prime is 665212676887151. The next prime is 665212676887207. The reversal of 665212676887200 is 2788676212566.

It is not an unprimeable number, because it can be changed into a prime (665212676887207) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3205477842 + ... + 3205685358.

It is an arithmetic number, because the mean of its divisors is an integer number (4085249152320).

Almost surely, 2^{665212676887200} is an apocalyptic number.

665212676887200 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 665212676887200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1176551755868160).

665212676887200 is an abundant number, since it is smaller than the sum of its proper divisors (1687890834849120).

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

665212676887200 is a wasteful number, since it uses less digits than its factorization.

665212676887200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208489 (or 208476 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 66.

The spelling of 665212676887200 in words is "six hundred sixty-five trillion, two hundred twelve billion, six hundred seventy-six million, eight hundred eighty-seven thousand, two hundred".