255077665 has 4 divisors (see below), whose sum is σ = 306093204. Its totient is φ = 204062128.

The previous prime is 255077663. The next prime is 255077681. The reversal of 255077665 is 566770552.

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 151363809 + 103713856 = 12303^2 + 10184^2 .

It is a cyclic number.

It is not a de Polignac number, because 255077665 - 2¹ = 255077663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255077663) by changing a digit.

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, 25507762 + ... + 25507771.

It is an arithmetic number, because the mean of its divisors is an integer number (76523301).

Almost surely, 2^255077665 is an apocalyptic number.

It is an amenable number.

255077665 is a deficient number, since it is larger than the sum of its proper divisors (51015539).

255077665 is an equidigital number, since it uses as much as digits as its factorization.

255077665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51015538.

The product of its (nonzero) digits is 441000, while the sum is 43.

The square root of 255077665 is about 15971.1510230165. The cubic root of 255077665 is about 634.1969429659.

The spelling of 255077665 in words is "two hundred fifty-five million, seventy-seven thousand, six hundred sixty-five".