255600665 has 4 divisors (see below), whose sum is σ = 306720804. Its totient is φ = 204480528.

The previous prime is 255600659. The next prime is 255600707. The reversal of 255600665 is 566006552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 158558464 + 97042201 = 12592^2 + 9851^2 .

It is a cyclic number.

It is not a de Polignac number, because 255600665 - 2⁴ = 255600649 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25560062 + ... + 25560071.

It is an arithmetic number, because the mean of its divisors is an integer number (76680201).

Almost surely, 2^255600665 is an apocalyptic number.

It is an amenable number.

255600665 is a deficient number, since it is larger than the sum of its proper divisors (51120139).

255600665 is an equidigital number, since it uses as much as digits as its factorization.

255600665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51120138.

The product of its (nonzero) digits is 54000, while the sum is 35.

The square root of 255600665 is about 15987.5159108599. The cubic root of 255600665 is about 634.6300902170.

The spelling of 255600665 in words is "two hundred fifty-five million, six hundred thousand, six hundred sixty-five".