255668717 has 8 divisors (see below), whose sum is σ = 260460672. Its totient is φ = 250905600.

The previous prime is 255668711. The next prime is 255668719. The reversal of 255668717 is 717866552.

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 255668717 - 2⁴ = 255668701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255668711) 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, 11117 + ... + 25197.

It is an arithmetic number, because the mean of its divisors is an integer number (32557584).

Almost surely, 2^255668717 is an apocalyptic number.

It is an amenable number.

255668717 is a deficient number, since it is larger than the sum of its proper divisors (4791955).

255668717 is a wasteful number, since it uses less digits than its factorization.

255668717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14419.

The product of its digits is 705600, while the sum is 47.

The square root of 255668717 is about 15989.6440548250. The cubic root of 255668717 is about 634.6864072518.

The spelling of 255668717 in words is "two hundred fifty-five million, six hundred sixty-eight thousand, seven hundred seventeen".