866562 has 8 divisors (see below), whose sum is σ = 1733136. Its totient is φ = 288852.

The previous prime is 866519. The next prime is 866573. The reversal of 866562 is 265668.

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

866562 is an admirable number.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72208 + ... + 72219.

It is an arithmetic number, because the mean of its divisors is an integer number (216642).

2⁸⁶⁶⁵⁶² is an apocalyptic number.

866562 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

866562 is a wasteful number, since it uses less digits than its factorization.

866562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144432.

The product of its digits is 17280, while the sum is 33.

The square root of 866562 is about 930.8931195363. The cubic root of 866562 is about 95.3381119203.

The spelling of 866562 in words is "eight hundred sixty-six thousand, five hundred sixty-two".