665341134271 has 8 divisors (see below), whose sum is σ = 739521535824. Its totient is φ = 593443206720.

The previous prime is 665341134253. The next prime is 665341134281. The reversal of 665341134271 is 172431143566.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 665341134271 - 2¹¹ = 665341132223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665341134221) 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, 570617886 + ... + 570619051.

It is an arithmetic number, because the mean of its divisors is an integer number (92440191978).

Almost surely, 2^665341134271 is an apocalyptic number.

665341134271 is a deficient number, since it is larger than the sum of its proper divisors (74180401553).

665341134271 is a wasteful number, since it uses less digits than its factorization.

665341134271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141237001.

The product of its digits is 362880, while the sum is 43.

The spelling of 665341134271 in words is "six hundred sixty-five billion, three hundred forty-one million, one hundred thirty-four thousand, two hundred seventy-one".