255666465 has 24 divisors (see below), whose sum is σ = 458438760. Its totient is φ = 131652864.

The previous prime is 255666461. The next prime is 255666487. The reversal of 255666465 is 564666552.

It is a happy number.

255666465 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 4 ways, for example, as 12680721 + 242985744 = 3561^2 + 15588^2 .

It is not a de Polignac number, because 255666465 - 2² = 255666461 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 255666465.

It is not an unprimeable number, because it can be changed into a prime (255666461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96652 + ... + 99261.

It is an arithmetic number, because the mean of its divisors is an integer number (19101615).

Almost surely, 2^255666465 is an apocalyptic number.

It is an amenable number.

255666465 is a deficient number, since it is larger than the sum of its proper divisors (202772295).

255666465 is a wasteful number, since it uses less digits than its factorization.

255666465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195953 (or 195950 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 45.

The square root of 255666465 is about 15989.5736340904. The cubic root of 255666465 is about 634.6845437492.

The spelling of 255666465 in words is "two hundred fifty-five million, six hundred sixty-six thousand, four hundred sixty-five".