866533 has 8 divisors (see below), whose sum is σ = 928800. Its totient is φ = 805968.

The previous prime is 866519. The next prime is 866573. The reversal of 866533 is 335668.

866533 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

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 866533 - 2¹⁷ = 735461 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 866495 and 866504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735 + ... + 1507.

It is an arithmetic number, because the mean of its divisors is an integer number (116100).

2⁸⁶⁶⁵³³ is an apocalyptic number.

It is an amenable number.

866533 is a deficient number, since it is larger than the sum of its proper divisors (62267).

866533 is a wasteful number, since it uses less digits than its factorization.

866533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its digits is 12960, while the sum is 31.

The square root of 866533 is about 930.8775429669. The cubic root of 866533 is about 95.3370483933.

The spelling of 866533 in words is "eight hundred sixty-six thousand, five hundred thirty-three".