255660769 has 16 divisors (see below), whose sum is σ = 316971648. Its totient is φ = 200794752.

The previous prime is 255660767. The next prime is 255660791. The reversal of 255660769 is 967066552.

It is a cyclic number.

It is not a de Polignac number, because 255660769 - 2¹ = 255660767 is a prime.

It is a super-2 number, since 2×255660769² = 130724857611342722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (255660761) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2214 + ... + 22720.

It is an arithmetic number, because the mean of its divisors is an integer number (19810728).

Almost surely, 2^255660769 is an apocalyptic number.

It is an amenable number.

255660769 is a deficient number, since it is larger than the sum of its proper divisors (61310879).

255660769 is a wasteful number, since it uses less digits than its factorization.

255660769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20664.

The product of its (nonzero) digits is 680400, while the sum is 46.

The square root of 255660769 is about 15989.3955170294. The cubic root of 255660769 is about 634.6798303296.

The spelling of 255660769 in words is "two hundred fifty-five million, six hundred sixty thousand, seven hundred sixty-nine".