264255665 has 8 divisors (see below), whose sum is σ = 325677480. Its totient is φ = 205690752.

The previous prime is 264255659. The next prime is 264255679. The reversal of 264255665 is 566552462.

It can be written as a sum of positive squares in 4 ways, for example, as 85525504 + 178730161 = 9248^2 + 13369^2 .

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 264255665 - 2²⁰ = 263207089 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 714020 + ... + 714389.

It is an arithmetic number, because the mean of its divisors is an integer number (40709685).

Almost surely, 2^264255665 is an apocalyptic number.

It is an amenable number.

264255665 is a deficient number, since it is larger than the sum of its proper divisors (61421815).

264255665 is a wasteful number, since it uses less digits than its factorization.

264255665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428451.

The product of its digits is 432000, while the sum is 41.

The square root of 264255665 is about 16255.9424519159. The cubic root of 264255665 is about 641.7138835965.

The spelling of 264255665 in words is "two hundred sixty-four million, two hundred fifty-five thousand, six hundred sixty-five".