257335668663 has 8 divisors (see below), whose sum is σ = 354945750000. Its totient is φ = 165641349888.

The previous prime is 257335668649. The next prime is 257335668673. The reversal of 257335668663 is 366866533752.

It is a happy number.

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

It is not a de Polignac number, because 257335668663 - 2³³ = 248745734071 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 257335668597 and 257335668606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257335668673) 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, 1478940538 + ... + 1478940711.

It is an arithmetic number, because the mean of its divisors is an integer number (44368218750).

Almost surely, 2^257335668663 is an apocalyptic number.

257335668663 is a deficient number, since it is larger than the sum of its proper divisors (97610081337).

257335668663 is a wasteful number, since it uses less digits than its factorization.

257335668663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957881281.

The product of its digits is 97977600, while the sum is 60.

The spelling of 257335668663 in words is "two hundred fifty-seven billion, three hundred thirty-five million, six hundred sixty-eight thousand, six hundred sixty-three".