665621112202 has 8 divisors (see below), whose sum is σ = 998437666176. Its totient is φ = 332808556812.

The previous prime is 665621112197. The next prime is 665621112203. The reversal of 665621112202 is 202211126566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (665621112203) 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 3 ways as a sum of consecutive naturals, for example, 541488 + ... + 1274539.

It is an arithmetic number, because the mean of its divisors is an integer number (124804708272).

Almost surely, 2^665621112202 is an apocalyptic number.

665621112202 is a deficient number, since it is larger than the sum of its proper divisors (332816553974).

665621112202 is a wasteful number, since it uses less digits than its factorization.

665621112202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999292.

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 665621112202 its reverse (202211126566), we get a palindrome (867832238768).

The spelling of 665621112202 in words is "six hundred sixty-five billion, six hundred twenty-one million, one hundred twelve thousand, two hundred two".