275666 has 8 divisors (see below), whose sum is σ = 415740. Its totient is φ = 137088.

The previous prime is 275657. The next prime is 275669. The reversal of 275666 is 666572.

It can be written as a sum of positive squares in 2 ways, for example, as 271441 + 4225 = 521^2 + 65^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 275666.

It is not an unprimeable number, because it can be changed into a prime (275669) by changing a digit.

275666 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470 + ... + 878.

2²⁷⁵⁶⁶⁶ is an apocalyptic number.

275666 is a deficient number, since it is larger than the sum of its proper divisors (140074).

275666 is a wasteful number, since it uses less digits than its factorization.

275666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748.

The product of its digits is 15120, while the sum is 32.

The square root of 275666 is about 525.0390461670. The cubic root of 275666 is about 65.0820266206.

It can be divided in two parts, 27566 and 6, that added together give a palindrome (27572).

The spelling of 275666 in words is "two hundred seventy-five thousand, six hundred sixty-six".