266986 has 4 divisors (see below), whose sum is σ = 400482. Its totient is φ = 133492.

The previous prime is 266983. The next prime is 266993. The reversal of 266986 is 689662.

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

It can be written as a sum of positive squares in only one way, i.e., 185761 + 81225 = 431^2 + 285^2 .

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 as a sum of consecutive naturals, namely, 66745 + ... + 66748.

2²⁶⁶⁹⁸⁶ is an apocalyptic number.

266986 is a deficient number, since it is larger than the sum of its proper divisors (133496).

266986 is a wasteful number, since it uses less digits than its factorization.

266986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133495.

The product of its digits is 31104, while the sum is 37.

The square root of 266986 is about 516.7068801555. The cubic root of 266986 is about 64.3916414701.

The spelling of 266986 in words is "two hundred sixty-six thousand, nine hundred eighty-six".