266851 has 6 divisors (see below), whose sum is σ = 289140. Its totient is φ = 246168.

The previous prime is 266839. The next prime is 266863. The reversal of 266851 is 158662.

It is an interprime number because it is at equal distance from previous prime (266839) and next prime (266863).

It is not a de Polignac number, because 266851 - 2¹³ = 258659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 621 + ... + 958.

It is an arithmetic number, because the mean of its divisors is an integer number (48190).

2²⁶⁶⁸⁵¹ is an apocalyptic number.

266851 is a deficient number, since it is larger than the sum of its proper divisors (22289).

266851 is a wasteful number, since it uses less digits than its factorization.

266851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1605 (or 1592 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 266851 is about 516.5762286439. The cubic root of 266851 is about 64.3807865474.

The spelling of 266851 in words is "two hundred sixty-six thousand, eight hundred fifty-one".