655256665 has 12 divisors (see below), whose sum is σ = 914685156. Its totient is φ = 449318688.

The previous prime is 655256663. The next prime is 655256669. The reversal of 655256665 is 566652556.

655256665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 337383424 + 317873241 = 18368^2 + 17829^2 .

It is not a de Polignac number, because 655256665 - 2¹ = 655256663 is a prime.

It is a super-2 number, since 2×655256665² = 858722594053844450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (655256663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1337014 + ... + 1337503.

It is an arithmetic number, because the mean of its divisors is an integer number (76223763).

Almost surely, 2^655256665 is an apocalyptic number.

It is an amenable number.

655256665 is a deficient number, since it is larger than the sum of its proper divisors (259428491).

655256665 is a wasteful number, since it uses less digits than its factorization.

655256665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2674536 (or 2674529 counting only the distinct ones).

The product of its digits is 1620000, while the sum is 46.

The square root of 655256665 is about 25597.9816587168. The cubic root of 655256665 is about 868.5679815343.

The spelling of 655256665 in words is "six hundred fifty-five million, two hundred fifty-six thousand, six hundred sixty-five".