866611712 has 30 divisors (see below), whose sum is σ = 1732862769. Its totient is φ = 432972800.

The previous prime is 866611663. The next prime is 866611741. The reversal of 866611712 is 217116668.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 467251456 + 399360256 = 21616^2 + 19984^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20816.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 665462 + ... + 666762.

Almost surely, 2^866611712 is an apocalyptic number.

It is an amenable number.

866611712 is a deficient number, since it is larger than the sum of its proper divisors (866251057).

866611712 is an frugal number, since it uses more digits than its factorization.

866611712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620 (or 1303 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 866611712 is about 29438.2695143583. The cubic root of 866611712 is about 953.3993497027.

The spelling of 866611712 in words is "eight hundred sixty-six million, six hundred eleven thousand, seven hundred twelve".