664775453271 has 8 divisors (see below), whose sum is σ = 924904978560. Its totient is φ = 423914781752.

The previous prime is 664775453267. The next prime is 664775453273. The reversal of 664775453271 is 172354577466.

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 664775453271 - 2² = 664775453267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664775453273) 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, 4817213361 + ... + 4817213498.

It is an arithmetic number, because the mean of its divisors is an integer number (115613122320).

Almost surely, 2^664775453271 is an apocalyptic number.

664775453271 is a deficient number, since it is larger than the sum of its proper divisors (260129525289).

664775453271 is a wasteful number, since it uses less digits than its factorization.

664775453271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9634426885.

The product of its digits is 29635200, while the sum is 57.

The spelling of 664775453271 in words is "six hundred sixty-four billion, seven hundred seventy-five million, four hundred fifty-three thousand, two hundred seventy-one".