255666353 has 2 divisors, whose sum is σ = 255666354. Its totient is φ = 255666352.

The previous prime is 255666343. The next prime is 255666401. The reversal of 255666353 is 353666552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 205865104 + 49801249 = 14348^2 + 7057^2 .

It is a cyclic number.

It is not a de Polignac number, because 255666353 - 2⁶ = 255666289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 255666353.

It is not a weakly prime, because it can be changed into another prime (255666343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127833176 + 127833177.

It is an arithmetic number, because the mean of its divisors is an integer number (127833177).

Almost surely, 2^255666353 is an apocalyptic number.

It is an amenable number.

255666353 is a deficient number, since it is larger than the sum of its proper divisors (1).

255666353 is an equidigital number, since it uses as much as digits as its factorization.

255666353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486000, while the sum is 41.

The square root of 255666353 is about 15989.5701318078. The cubic root of 255666353 is about 634.6844510703.

The spelling of 255666353 in words is "two hundred fifty-five million, six hundred sixty-six thousand, three hundred fifty-three".