866712798244 has 6 divisors (see below), whose sum is σ = 1516747396934. Its totient is φ = 433356399120.

The previous prime is 866712798227. The next prime is 866712798283. The reversal of 866712798244 is 442897217668.

It can be written as a sum of positive squares in only one way, i.e., 691788100644 + 174924697600 = 831738^2 + 418240^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108339099777 + ... + 108339099784.

Almost surely, 2^866712798244 is an apocalyptic number.

It is an amenable number.

866712798244 is a deficient number, since it is larger than the sum of its proper divisors (650034598690).

866712798244 is a wasteful number, since it uses less digits than its factorization.

866712798244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216678199565 (or 216678199563 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 64.

The spelling of 866712798244 in words is "eight hundred sixty-six billion, seven hundred twelve million, seven hundred ninety-eight thousand, two hundred forty-four".