866776 has 8 divisors (see below), whose sum is σ = 1625220. Its totient is φ = 433384.

The previous prime is 866759. The next prime is 866777. The reversal of 866776 is 677668.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866777) 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 as a sum of consecutive naturals, namely, 54166 + ... + 54181.

2⁸⁶⁶⁷⁷⁶ is an apocalyptic number.

It is an amenable number.

866776 is a deficient number, since it is larger than the sum of its proper divisors (758444).

866776 is a wasteful number, since it uses less digits than its factorization.

866776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108353 (or 108349 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 866776 is about 931.0080558191. The cubic root of 866776 is about 95.3459592821.

The spelling of 866776 in words is "eight hundred sixty-six thousand, seven hundred seventy-six".