866976 has 48 divisors (see below), whose sum is σ = 2485728. Its totient is φ = 262400.

The previous prime is 866969. The next prime is 867001. The reversal of 866976 is 679668.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 646 + ... + 1466.

It is an arithmetic number, because the mean of its divisors is an integer number (51786).

2⁸⁶⁶⁹⁷⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 866976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1242864).

866976 is an abundant number, since it is smaller than the sum of its proper divisors (1618752).

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

866976 is a wasteful number, since it uses less digits than its factorization.

866976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 837 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

The square root of 866976 is about 931.1154600800. The cubic root of 866976 is about 95.3532920976.

The spelling of 866976 in words is "eight hundred sixty-six thousand, nine hundred seventy-six".