266749 has 8 divisors (see below), whose sum is σ = 311040. Its totient is φ = 224016.

The previous prime is 266719. The next prime is 266759. The reversal of 266749 is 947662.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266719) 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, 12 + ... + 730.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2²⁶⁶⁷⁴⁹ is an apocalyptic number.

It is an amenable number.

266749 is a deficient number, since it is larger than the sum of its proper divisors (44291).

266749 is an equidigital number, since it uses as much as digits as its factorization.

266749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

The product of its digits is 18144, while the sum is 34.

The square root of 266749 is about 516.4774922492. The cubic root of 266749 is about 64.3725826220.

The spelling of 266749 in words is "two hundred sixty-six thousand, seven hundred forty-nine".