665200121214 has 16 divisors (see below), whose sum is σ = 1343572523280. Its totient is φ = 219537993600.

The previous prime is 665200121213. The next prime is 665200121219. The reversal of 665200121214 is 412121002566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665200121213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548844379 + ... + 548845590.

It is an arithmetic number, because the mean of its divisors is an integer number (83973282705).

Almost surely, 2^665200121214 is an apocalyptic number.

665200121214 is an abundant number, since it is smaller than the sum of its proper divisors (678372402066).

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

665200121214 is a wasteful number, since it uses less digits than its factorization.

665200121214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1097690075.

The product of its (nonzero) digits is 5760, while the sum is 30.

The spelling of 665200121214 in words is "six hundred sixty-five billion, two hundred million, one hundred twenty-one thousand, two hundred fourteen".