255766257 has 6 divisors (see below), whose sum is σ = 369440162. Its totient is φ = 170510832.

The previous prime is 255766253. The next prime is 255766261. The reversal of 255766257 is 752667552.

255766257 is a `hidden beast` number, since 25 + 576 + 6 + 2 + 57 = 666.

It is an interprime number because it is at equal distance from previous prime (255766253) and next prime (255766261).

It can be written as a sum of positive squares in only one way, i.e., 248346081 + 7420176 = 15759^2 + 2724^2 .

It is not a de Polignac number, because 255766257 - 2² = 255766253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255766253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14209228 + ... + 14209245.

Almost surely, 2^255766257 is an apocalyptic number.

It is an amenable number.

255766257 is a deficient number, since it is larger than the sum of its proper divisors (113673905).

255766257 is a wasteful number, since it uses less digits than its factorization.

255766257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28418479 (or 28418476 counting only the distinct ones).

The product of its digits is 882000, while the sum is 45.

The square root of 255766257 is about 15992.6938631364. The cubic root of 255766257 is about 634.7671099177.

The spelling of 255766257 in words is "two hundred fifty-five million, seven hundred sixty-six thousand, two hundred fifty-seven".