665020001211 has 8 divisors (see below), whose sum is σ = 887546749440. Its totient is φ = 442919960232.

The previous prime is 665020001207. The next prime is 665020001291. The reversal of 665020001211 is 112100020566.

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

It is not a de Polignac number, because 665020001211 - 2² = 665020001207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665020001291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106673175 + ... + 106679408.

It is an arithmetic number, because the mean of its divisors is an integer number (110943343680).

Almost surely, 2^665020001211 is an apocalyptic number.

665020001211 is a deficient number, since it is larger than the sum of its proper divisors (222526748229).

665020001211 is a wasteful number, since it uses less digits than its factorization.

665020001211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213353625.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 665020001211 its reverse (112100020566), we get a palindrome (777120021777).

The spelling of 665020001211 in words is "six hundred sixty-five billion, twenty million, one thousand, two hundred eleven".