266408 has 8 divisors (see below), whose sum is σ = 499530. Its totient is φ = 133200.

The previous prime is 266401. The next prime is 266411. The reversal of 266408 is 804662.

It can be written as a sum of positive squares in only one way, i.e., 209764 + 56644 = 458^2 + 238^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (266401) by changing a digit.

266408 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 16643 + ... + 16658.

2²⁶⁶⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

266408 is a deficient number, since it is larger than the sum of its proper divisors (233122).

266408 is a wasteful number, since it uses less digits than its factorization.

266408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33307 (or 33303 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 266408 is about 516.1472658070. The cubic root of 266408 is about 64.3451405809.

The spelling of 266408 in words is "two hundred sixty-six thousand, four hundred eight".