264566 has 4 divisors (see below), whose sum is σ = 396852. Its totient is φ = 132282.

The previous prime is 264559. The next prime is 264577. The reversal of 264566 is 665462.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

264566 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66140 + ... + 66143.

It is an arithmetic number, because the mean of its divisors is an integer number (99213).

2²⁶⁴⁵⁶⁶ is an apocalyptic number.

264566 is a deficient number, since it is larger than the sum of its proper divisors (132286).

264566 is a wasteful number, since it uses less digits than its factorization.

264566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132285.

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

The square root of 264566 is about 514.3597962516. The cubic root of 264566 is about 64.1964989373.

It can be divided in two parts, 26456 and 6, that added together give a palindrome (26462).

The spelling of 264566 in words is "two hundred sixty-four thousand, five hundred sixty-six".