663256304271 has 24 divisors (see below), whose sum is σ = 1070622156240. Its totient is φ = 392169283200.

The previous prime is 663256304261. The next prime is 663256304273. The reversal of 663256304271 is 172403652366.

663256304271 is a `hidden beast` number, since 6 + 6 + 3 + 2 + 5 + 630 + 4 + 2 + 7 + 1 = 666.

It is not a de Polignac number, because 663256304271 - 2¹⁰ = 663256303247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663256304273) 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, 81697876 + ... + 81705993.

It is an arithmetic number, because the mean of its divisors is an integer number (44609256510).

Almost surely, 2^663256304271 is an apocalyptic number.

663256304271 is a deficient number, since it is larger than the sum of its proper divisors (407365851969).

663256304271 is a wasteful number, since it uses less digits than its factorization.

663256304271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163403927 (or 163403924 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 45.

The spelling of 663256304271 in words is "six hundred sixty-three billion, two hundred fifty-six million, three hundred four thousand, two hundred seventy-one".