866104 has 8 divisors (see below), whose sum is σ = 1623960. Its totient is φ = 433048.

The previous prime is 866101. The next prime is 866119. The reversal of 866104 is 401668.

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

It is a super-2 number, since 2×866104² = 1500272277632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866101) 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, 54124 + ... + 54139.

It is an arithmetic number, because the mean of its divisors is an integer number (202995).

2⁸⁶⁶¹⁰⁴ is an apocalyptic number.

It is an amenable number.

866104 is a deficient number, since it is larger than the sum of its proper divisors (757856).

866104 is a wasteful number, since it uses less digits than its factorization.

866104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108269 (or 108265 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 866104 is about 930.6470867090. The cubic root of 866104 is about 95.3213127568.

The spelling of 866104 in words is "eight hundred sixty-six thousand, one hundred four".