866770 has 8 divisors (see below), whose sum is σ = 1560204. Its totient is φ = 346704.

The previous prime is 866759. The next prime is 866777. The reversal of 866770 is 77668.

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 9 = 931^2 + 3^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (866777) by changing a digit.

866770 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 in 3 ways as a sum of consecutive naturals, for example, 43329 + ... + 43348.

2⁸⁶⁶⁷⁷⁰ is an apocalyptic number.

866770 is a deficient number, since it is larger than the sum of its proper divisors (693434).

866770 is a wasteful number, since it uses less digits than its factorization.

866770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86684.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 866770 is about 931.0048334998. The cubic root of 866770 is about 95.3457392802.

The spelling of 866770 in words is "eight hundred sixty-six thousand, seven hundred seventy".