258668551 has 2 divisors, whose sum is σ = 258668552. Its totient is φ = 258668550.

The previous prime is 258668497. The next prime is 258668561. The reversal of 258668551 is 155866852.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258668551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (258668561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129334275 + 129334276.

It is an arithmetic number, because the mean of its divisors is an integer number (129334276).

Almost surely, 2^258668551 is an apocalyptic number.

258668551 is a deficient number, since it is larger than the sum of its proper divisors (1).

258668551 is an equidigital number, since it uses as much as digits as its factorization.

258668551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576000, while the sum is 46.

The square root of 258668551 is about 16083.1760234103. The cubic root of 258668551 is about 637.1590803595.

The spelling of 258668551 in words is "two hundred fifty-eight million, six hundred sixty-eight thousand, five hundred fifty-one".