255858665 has 8 divisors (see below), whose sum is σ = 307229760. Its totient is φ = 204554032.

The previous prime is 255858641. The next prime is 255858667. The reversal of 255858665 is 566858552.

255858665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255858665 - 2¹² = 255854569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255858667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7709 + ... + 23898.

It is an arithmetic number, because the mean of its divisors is an integer number (38403720).

Almost surely, 2^255858665 is an apocalyptic number.

It is an amenable number.

255858665 is a deficient number, since it is larger than the sum of its proper divisors (51371095).

255858665 is a wasteful number, since it uses less digits than its factorization.

255858665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33231.

The product of its digits is 2880000, while the sum is 50.

The square root of 255858665 is about 15995.5826714753. The cubic root of 255858665 is about 634.8435475433.

The spelling of 255858665 in words is "two hundred fifty-five million, eight hundred fifty-eight thousand, six hundred sixty-five".