258666791 has 2 divisors, whose sum is σ = 258666792. Its totient is φ = 258666790.

The previous prime is 258666787. The next prime is 258666851. The reversal of 258666791 is 197666852.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 258666791 - 2² = 258666787 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258666731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129333395 + 129333396.

It is an arithmetic number, because the mean of its divisors is an integer number (129333396).

Almost surely, 2^258666791 is an apocalyptic number.

258666791 is a deficient number, since it is larger than the sum of its proper divisors (1).

258666791 is an equidigital number, since it uses as much as digits as its factorization.

258666791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 50.

The square root of 258666791 is about 16083.1213077562. The cubic root of 258666791 is about 637.1576352636.

The spelling of 258666791 in words is "two hundred fifty-eight million, six hundred sixty-six thousand, seven hundred ninety-one".