266664 has 32 divisors (see below), whose sum is σ = 685440. Its totient is φ = 86400.

The previous prime is 266663. The next prime is 266671. The reversal of 266664 is 466662.

It is a super-2 number, since 2×266664² = 142219377792, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (266663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 849 + ... + 1119.

It is an arithmetic number, because the mean of its divisors is an integer number (21420).

2²⁶⁶⁶⁶⁴ is an apocalyptic number.

266664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342720).

266664 is an abundant number, since it is smaller than the sum of its proper divisors (418776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266664 is a wasteful number, since it uses less digits than its factorization.

266664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 317 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 266664 is about 516.3951974990. The cubic root of 266664 is about 64.3657444198.

It can be divided in two parts, 2 and 66664, that added together give a palindrome (66666).

The spelling of 266664 in words is "two hundred sixty-six thousand, six hundred sixty-four".