266407 has 4 divisors (see below), whose sum is σ = 282096. Its totient is φ = 250720.

The previous prime is 266401. The next prime is 266411. The reversal of 266407 is 704662.

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

It is a cyclic number.

It is not a de Polignac number, because 266407 - 2¹¹ = 264359 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁷ + 6 + 4⁷ + 6⁴ + 0 + 7⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266401) 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 3 ways as a sum of consecutive naturals, for example, 7819 + ... + 7852.

It is an arithmetic number, because the mean of its divisors is an integer number (70524).

2²⁶⁶⁴⁰⁷ is an apocalyptic number.

266407 is a deficient number, since it is larger than the sum of its proper divisors (15689).

266407 is a wasteful number, since it uses less digits than its factorization.

266407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15688.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 266407 is about 516.1462970903. The cubic root of 266407 is about 64.3450600713.

The spelling of 266407 in words is "two hundred sixty-six thousand, four hundred seven".