266801 has 2 divisors, whose sum is σ = 266802. Its totient is φ = 266800.

The previous prime is 266797. The next prime is 266821. The reversal of 266801 is 108662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179776 + 87025 = 424^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 266801 - 2² = 266797 is a prime.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (266821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133400 + 133401.

It is an arithmetic number, because the mean of its divisors is an integer number (133401).

2²⁶⁶⁸⁰¹ is an apocalyptic number.

It is an amenable number.

266801 is a deficient number, since it is larger than the sum of its proper divisors (1).

266801 is an equidigital number, since it uses as much as digits as its factorization.

266801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 266801 is about 516.5278308088. The cubic root of 266801 is about 64.3767652766.

The spelling of 266801 in words is "two hundred sixty-six thousand, eight hundred one".