866713812 has 12 divisors (see below), whose sum is σ = 2022332256. Its totient is φ = 288904600.

The previous prime is 866713811. The next prime is 866713817. The reversal of 866713812 is 218317668.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866713811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36113064 + ... + 36113087.

It is an arithmetic number, because the mean of its divisors is an integer number (168527688).

Almost surely, 2^866713812 is an apocalyptic number.

It is an amenable number.

866713812 is an abundant number, since it is smaller than the sum of its proper divisors (1155618444).

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

866713812 is a wasteful number, since it uses less digits than its factorization.

866713812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72226158 (or 72226156 counting only the distinct ones).

The product of its digits is 96768, while the sum is 42.

The square root of 866713812 is about 29440.0036005433. The cubic root of 866713812 is about 953.4367898656.

The spelling of 866713812 in words is "eight hundred sixty-six million, seven hundred thirteen thousand, eight hundred twelve".