255666859 has 24 divisors (see below), whose sum is σ = 320899968. Its totient is φ = 202325760.

The previous prime is 255666847. The next prime is 255666881. The reversal of 255666859 is 958666552.

It is not a de Polignac number, because 255666859 - 2¹¹ = 255664811 is a prime.

It is a super-3 number, since 3×255666859³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255666959) 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 in 23 ways as a sum of consecutive naturals, for example, 41254 + ... + 47044.

It is an arithmetic number, because the mean of its divisors is an integer number (13370832).

Almost surely, 2^255666859 is an apocalyptic number.

255666859 is a deficient number, since it is larger than the sum of its proper divisors (65233109).

255666859 is a wasteful number, since it uses less digits than its factorization.

255666859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875 (or 5868 counting only the distinct ones).

The product of its digits is 3888000, while the sum is 52.

The square root of 255666859 is about 15989.5859546143. The cubic root of 255666859 is about 634.6848697802.

The spelling of 255666859 in words is "two hundred fifty-five million, six hundred sixty-six thousand, eight hundred fifty-nine".