266979 has 4 divisors (see below), whose sum is σ = 355976. Its totient is φ = 177984.

The previous prime is 266977. The next prime is 266983. The reversal of 266979 is 979662.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 266979 - 2¹ = 266977 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44494 + ... + 44499.

It is an arithmetic number, because the mean of its divisors is an integer number (88994).

2²⁶⁶⁹⁷⁹ is an apocalyptic number.

266979 is a deficient number, since it is larger than the sum of its proper divisors (88997).

266979 is an equidigital number, since it uses as much as digits as its factorization.

266979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88996.

The product of its digits is 40824, while the sum is 39.

The square root of 266979 is about 516.7001064447. The cubic root of 266979 is about 64.3910787122.

The spelling of 266979 in words is "two hundred sixty-six thousand, nine hundred seventy-nine".