257066683 has 2 divisors, whose sum is σ = 257066684. Its totient is φ = 257066682.

The previous prime is 257066681. The next prime is 257066723. The reversal of 257066683 is 386660752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257066683 - 2¹ = 257066681 is a prime.

Together with 257066681, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (257066681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128533341 + 128533342.

It is an arithmetic number, because the mean of its divisors is an integer number (128533342).

Almost surely, 2^257066683 is an apocalyptic number.

257066683 is a deficient number, since it is larger than the sum of its proper divisors (1).

257066683 is an equidigital number, since it uses as much as digits as its factorization.

257066683 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 257066683 is about 16033.2991926178. The cubic root of 257066683 is about 635.8411017081.

The spelling of 257066683 in words is "two hundred fifty-seven million, sixty-six thousand, six hundred eighty-three".