866648 has 16 divisors (see below), whose sum is σ = 1639680. Its totient is φ = 429408.

The previous prime is 866641. The next prime is 866653. The reversal of 866648 is 846668.

866648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590 + ... + 1442.

It is an arithmetic number, because the mean of its divisors is an integer number (102480).

2⁸⁶⁶⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

866648 is a deficient number, since it is larger than the sum of its proper divisors (773032).

866648 is a wasteful number, since it uses less digits than its factorization.

866648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 982 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 866648 is about 930.9393105890. The cubic root of 866648 is about 95.3412656882.

The spelling of 866648 in words is "eight hundred sixty-six thousand, six hundred forty-eight".