266626 has 8 divisors (see below), whose sum is σ = 413820. Its totient is φ = 128688.

The previous prime is 266603. The next prime is 266633. The reversal of 266626 is 626662.

It can be written as a sum of positive squares in 2 ways, for example, as 251001 + 15625 = 501^2 + 125^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 266594 and 266603.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2241 + ... + 2356.

2²⁶⁶⁶²⁶ is an apocalyptic number.

266626 is a deficient number, since it is larger than the sum of its proper divisors (147194).

266626 is a wasteful number, since it uses less digits than its factorization.

266626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4628.

The product of its digits is 5184, while the sum is 28.

The square root of 266626 is about 516.3584026623. The cubic root of 266626 is about 64.3626868711.

The spelling of 266626 in words is "two hundred sixty-six thousand, six hundred twenty-six".