266487 has 8 divisors (see below), whose sum is σ = 382704. Its totient is φ = 163968.

The previous prime is 266479. The next prime is 266489. The reversal of 266487 is 784662.

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

It is not a de Polignac number, because 266487 - 2³ = 266479 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 6 + 4⁹ + 6⁴ + 8³ + 7⁴ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3378 + ... + 3455.

It is an arithmetic number, because the mean of its divisors is an integer number (47838).

2²⁶⁶⁴⁸⁷ is an apocalyptic number.

266487 is a deficient number, since it is larger than the sum of its proper divisors (116217).

266487 is a wasteful number, since it uses less digits than its factorization.

266487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6849.

The product of its digits is 16128, while the sum is 33.

The square root of 266487 is about 516.2237886808. The cubic root of 266487 is about 64.3515002044.

The spelling of 266487 in words is "two hundred sixty-six thousand, four hundred eighty-seven".