266987 has 8 divisors (see below), whose sum is σ = 312576. Its totient is φ = 223272.

The previous prime is 266983. The next prime is 266993. The reversal of 266987 is 789662.

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

It is not a de Polignac number, because 266987 - 2² = 266983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 266987.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 266987.

It is not an unprimeable number, because it can be changed into a prime (266983) 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, 143 + ... + 744.

It is an arithmetic number, because the mean of its divisors is an integer number (39072).

2²⁶⁶⁹⁸⁷ is an apocalyptic number.

266987 is a deficient number, since it is larger than the sum of its proper divisors (45589).

266987 is an equidigital number, since it uses as much as digits as its factorization.

266987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937.

The product of its digits is 36288, while the sum is 38.

The square root of 266987 is about 516.7078478212. The cubic root of 266987 is about 64.3917218633.

The spelling of 266987 in words is "two hundred sixty-six thousand, nine hundred eighty-seven".