266065 has 8 divisors (see below), whose sum is σ = 322560. Its totient is φ = 210672.

The previous prime is 266059. The next prime is 266081. The reversal of 266065 is 560662.

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

It is a cyclic number.

It is not a de Polignac number, because 266065 - 2¹⁵ = 233297 is a prime.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426 + ... + 844.

It is an arithmetic number, because the mean of its divisors is an integer number (40320).

2²⁶⁶⁰⁶⁵ is an apocalyptic number.

It is an amenable number.

266065 is a deficient number, since it is larger than the sum of its proper divisors (56495).

266065 is a wasteful number, since it uses less digits than its factorization.

266065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 266065 is about 515.8148892772. The cubic root of 266065 is about 64.3175139558.

The spelling of 266065 in words is "two hundred sixty-six thousand, sixty-five".