257966680 has 32 divisors (see below), whose sum is σ = 584334000. Its totient is φ = 102491776.

The previous prime is 257966677. The next prime is 257966699. The reversal of 257966680 is 86669752.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15682 + ... + 27601.

Almost surely, 2^257966680 is an apocalyptic number.

257966680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257966680 is an abundant number, since it is smaller than the sum of its proper divisors (326367320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257966680 is a wasteful number, since it uses less digits than its factorization.

257966680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43443 (or 43439 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 257966680 is about 16061.3411644233. The cubic root of 257966680 is about 636.5822693910.

The spelling of 257966680 in words is "two hundred fifty-seven million, nine hundred sixty-six thousand, six hundred eighty".