266026 has 4 divisors (see below), whose sum is σ = 399042. Its totient is φ = 133012.

The previous prime is 266023. The next prime is 266027. The reversal of 266026 is 620662.

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., 225625 + 40401 = 475^2 + 201^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 265988 and 266006.

It is not an unprimeable number, because it can be changed into a prime (266023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66505 + ... + 66508.

2²⁶⁶⁰²⁶ is an apocalyptic number.

266026 is a deficient number, since it is larger than the sum of its proper divisors (133016).

266026 is a wasteful number, since it uses less digits than its factorization.

266026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133015.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 266026 is about 515.7770836321. Note that the first 3 decimals coincide. The cubic root of 266026 is about 64.3143712330.

Adding to 266026 its reverse (620662), we get a palindrome (886688).

The spelling of 266026 in words is "two hundred sixty-six thousand, twenty-six".