866612 has 6 divisors (see below), whose sum is σ = 1516578. Its totient is φ = 433304.

The previous prime is 866581. The next prime is 866623. The reversal of 866612 is 216668.

866612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 839056 + 27556 = 916^2 + 166^2 .

It is a congruent number.

It is an unprimeable number.

866612 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 as a sum of consecutive naturals, namely, 108323 + ... + 108330.

It is an arithmetic number, because the mean of its divisors is an integer number (252763).

2⁸⁶⁶⁶¹² is an apocalyptic number.

It is an amenable number.

866612 is a deficient number, since it is larger than the sum of its proper divisors (649966).

866612 is a wasteful number, since it uses less digits than its factorization.

866612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216657 (or 216655 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 866612 is about 930.9199750784. The cubic root of 866612 is about 95.3399455317.

The spelling of 866612 in words is "eight hundred sixty-six thousand, six hundred twelve".