255666065651071 has 2 divisors, whose sum is σ = 255666065651072. Its totient is φ = 255666065651070.

The previous prime is 255666065650967. The next prime is 255666065651137. The reversal of 255666065651071 is 170156560666552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255666065651071 - 2¹¹ = 255666065649023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255666065151071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127833032825535 + 127833032825536.

It is an arithmetic number, because the mean of its divisors is an integer number (127833032825536).

Almost surely, 2^{255666065651071} is an apocalyptic number.

255666065651071 is a deficient number, since it is larger than the sum of its proper divisors (1).

255666065651071 is an equidigital number, since it uses as much as digits as its factorization.

255666065651071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040000, while the sum is 61.

The spelling of 255666065651071 in words is "two hundred fifty-five trillion, six hundred sixty-six billion, sixty-five million, six hundred fifty-one thousand, seventy-one".