866757222445473 has 6 divisors (see below), whose sum is σ = 1251982654643474. Its totient is φ = 577838148296976.

The previous prime is 866757222445399. The next prime is 866757222445481. The reversal of 866757222445473 is 374544222757668.

866757222445473 is a `hidden beast` number, since 8 + 6 + 6 + 7 + 5 + 72 + 2 + 2 + 4 + 4 + 547 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 634450608019809 + 232306614425664 = 25188303^2 + 15241608^2 .

It is not a de Polignac number, because 866757222445473 - 2²⁹ = 866756685574561 is a prime.

It is a super-2 number, since 2×866757222445473² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866757222445493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48153179024740 + ... + 48153179024757.

Almost surely, 2^{866757222445473} is an apocalyptic number.

It is an amenable number.

866757222445473 is a deficient number, since it is larger than the sum of its proper divisors (385225432198001).

866757222445473 is a wasteful number, since it uses less digits than its factorization.

866757222445473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96306358049503 (or 96306358049500 counting only the distinct ones).

The product of its digits is 3793305600, while the sum is 72.

The spelling of 866757222445473 in words is "eight hundred sixty-six trillion, seven hundred fifty-seven billion, two hundred twenty-two million, four hundred forty-five thousand, four hundred seventy-three".