266668 has 12 divisors (see below), whose sum is σ = 470680. Its totient is φ = 132192.

The previous prime is 266663. The next prime is 266671. The reversal of 266668 is 866662.

It is a super-2 number, since 2×266668² = 142223644448, which contains 22 as substring.

Its product of digits (20736) is a multiple of the sum of its prime factors (576).

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (266663) 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, 448 + ... + 856.

2²⁶⁶⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

266668 is a deficient number, since it is larger than the sum of its proper divisors (204012).

266668 is a wasteful number, since it uses less digits than its factorization.

266668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 574 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 266668 is about 516.3990704872. The cubic root of 266668 is about 64.3660662501.

The spelling of 266668 in words is "two hundred sixty-six thousand, six hundred sixty-eight".