266465 has 8 divisors (see below), whose sum is σ = 322920. Its totient is φ = 211072.

The previous prime is 266449. The next prime is 266477. The reversal of 266465 is 564662.

It can be written as a sum of positive squares in 4 ways, for example, as 13456 + 253009 = 116^2 + 503^2 .

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 266465 - 2⁴ = 266449 is a prime.

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, 491 + ... + 879.

It is an arithmetic number, because the mean of its divisors is an integer number (40365).

2²⁶⁶⁴⁶⁵ is an apocalyptic number.

It is an amenable number.

266465 is a deficient number, since it is larger than the sum of its proper divisors (56455).

266465 is a wasteful number, since it uses less digits than its factorization.

266465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531.

The product of its digits is 8640, while the sum is 29.

The square root of 266465 is about 516.2024796531. The cubic root of 266465 is about 64.3497292963.

The spelling of 266465 in words is "two hundred sixty-six thousand, four hundred sixty-five".