260660 has 12 divisors (see below), whose sum is σ = 547428. Its totient is φ = 104256.

The previous prime is 260651. The next prime is 260671. The reversal of 260660 is 66062.

It can be written as a sum of positive squares in 2 ways, for example, as 128164 + 132496 = 358^2 + 364^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 13033 = 260660 / (2 + 6 + 0 + 6 + 6 + 0).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

260660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6497 + ... + 6536.

It is an arithmetic number, because the mean of its divisors is an integer number (45619).

2²⁶⁰⁶⁶⁰ is an apocalyptic number.

260660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

260660 is an abundant number, since it is smaller than the sum of its proper divisors (286768).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

260660 is a wasteful number, since it uses less digits than its factorization.

260660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13042 (or 13040 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 260660 is about 510.5487244133. The cubic root of 260660 is about 63.8790031613.

The spelling of 260660 in words is "two hundred sixty thousand, six hundred sixty".