665133271257 has 24 divisors (see below), whose sum is σ = 1110991840896. Its totient is φ = 350839526688.

The previous prime is 665133271241. The next prime is 665133271291. The reversal of 665133271257 is 752172331566.

It is not a de Polignac number, because 665133271257 - 2⁴ = 665133271241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (665133271237) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174025633 + ... + 174029454.

It is an arithmetic number, because the mean of its divisors is an integer number (46291326704).

Almost surely, 2^665133271257 is an apocalyptic number.

It is an amenable number.

665133271257 is a deficient number, since it is larger than the sum of its proper divisors (445858569639).

665133271257 is a wasteful number, since it uses less digits than its factorization.

665133271257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348055117 (or 348055110 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 48.

The spelling of 665133271257 in words is "six hundred sixty-five billion, one hundred thirty-three million, two hundred seventy-one thousand, two hundred fifty-seven".