257975666695 has 16 divisors (see below), whose sum is σ = 314399812608. Its totient is φ = 203165281440.

The previous prime is 257975666681. The next prime is 257975666719. The reversal of 257975666695 is 596666579752.

It is not a de Polignac number, because 257975666695 - 2¹¹ = 257975664647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251362 + ... + 761008.

It is an arithmetic number, because the mean of its divisors is an integer number (19649988288).

Almost surely, 2^257975666695 is an apocalyptic number.

257975666695 is a deficient number, since it is larger than the sum of its proper divisors (56424145913).

257975666695 is a wasteful number, since it uses less digits than its factorization.

257975666695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511230.

The product of its digits is 1285956000, while the sum is 73.

The spelling of 257975666695 in words is "two hundred fifty-seven billion, nine hundred seventy-five million, six hundred sixty-six thousand, six hundred ninety-five".