257942663 has 8 divisors (see below), whose sum is σ = 284954880. Its totient is φ = 231524280.

The previous prime is 257942621. The next prime is 257942687. The reversal of 257942663 is 366249752.

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 257942663 - 2¹⁰ = 257941639 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 (257942963) 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, 147545 + ... + 149282.

It is an arithmetic number, because the mean of its divisors is an integer number (35619360).

Almost surely, 2^257942663 is an apocalyptic number.

257942663 is a deficient number, since it is larger than the sum of its proper divisors (27012217).

257942663 is a wasteful number, since it uses less digits than its factorization.

257942663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296917.

The product of its digits is 544320, while the sum is 44.

The square root of 257942663 is about 16060.5934821849. The cubic root of 257942663 is about 636.5625132596.

The spelling of 257942663 in words is "two hundred fifty-seven million, nine hundred forty-two thousand, six hundred sixty-three".