665055112331 has 32 divisors (see below), whose sum is σ = 721789056000. Its totient is φ = 610778161152.

The previous prime is 665055112321. The next prime is 665055112333. The reversal of 665055112331 is 133211550566.

It is not a de Polignac number, because 665055112331 - 2¹⁰ = 665055111307 is a prime.

It is a super-2 number, since 2×665055112331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665055112333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41072585 + ... + 41088773.

It is an arithmetic number, because the mean of its divisors is an integer number (22555908000).

Almost surely, 2^665055112331 is an apocalyptic number.

665055112331 is a deficient number, since it is larger than the sum of its proper divisors (56733943669).

665055112331 is a wasteful number, since it uses less digits than its factorization.

665055112331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16691.

The product of its (nonzero) digits is 81000, while the sum is 38.

Adding to 665055112331 its reverse (133211550566), we get a palindrome (798266662897).

The spelling of 665055112331 in words is "six hundred sixty-five billion, fifty-five million, one hundred twelve thousand, three hundred thirty-one".