866530 has 16 divisors (see below), whose sum is σ = 1782720. Its totient is φ = 297072.

The previous prime is 866519. The next prime is 866573. The reversal of 866530 is 35668.

866530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is an unprimeable number.

866530 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 in 7 ways as a sum of consecutive naturals, for example, 6120 + ... + 6259.

It is an arithmetic number, because the mean of its divisors is an integer number (111420).

2⁸⁶⁶⁵³⁰ is an apocalyptic number.

866530 is an abundant number, since it is smaller than the sum of its proper divisors (916190).

It is a weird number, because it is abundant, but not a pseudoperfect number.

866530 is a wasteful number, since it uses less digits than its factorization.

866530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12393.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 866530 is about 930.8759315827. The cubic root of 866530 is about 95.3369383719.

The spelling of 866530 in words is "eight hundred sixty-six thousand, five hundred thirty".