866960 has 20 divisors (see below), whose sum is σ = 2015868. Its totient is φ = 346752.

The previous prime is 866953. The next prime is 866963. The reversal of 866960 is 69668.

It can be written as a sum of positive squares in 2 ways, for example, as 246016 + 620944 = 496^2 + 788^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 866960.

It is not an unprimeable number, because it can be changed into a prime (866963) by changing a digit.

866960 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 in 3 ways as a sum of consecutive naturals, for example, 5339 + ... + 5498.

2⁸⁶⁶⁹⁶⁰ is an apocalyptic number.

866960 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866960 is an abundant number, since it is smaller than the sum of its proper divisors (1148908).

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

866960 is a wasteful number, since it uses less digits than its factorization.

866960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10850 (or 10844 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 866960 is about 931.1068681951. The cubic root of 866960 is about 95.3527055138.

The spelling of 866960 in words is "eight hundred sixty-six thousand, nine hundred sixty".