866466 has 24 divisors (see below), whose sum is σ = 1929564. Its totient is φ = 280800.

The previous prime is 866461. The next prime is 866471. The reversal of 866466 is 664668.

866466 is a `hidden beast` number, since 8 + 6 + 646 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (866461) and next prime (866471).

It can be written as a sum of positive squares in 2 ways, for example, as 848241 + 18225 = 921^2 + 135^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 866466.

It is not an unprimeable number, because it can be changed into a prime (866461) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16 + ... + 1316.

2⁸⁶⁶⁴⁶⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (964782).

866466 is an abundant number, since it is smaller than the sum of its proper divisors (1063098).

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

866466 is a wasteful number, since it uses less digits than its factorization.

866466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1346 (or 1343 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 866466 is about 930.8415547235. The cubic root of 866466 is about 95.3345911886.

The spelling of 866466 in words is "eight hundred sixty-six thousand, four hundred sixty-six".