866181545846612 has 18 divisors (see below), whose sum is σ = 1610228496563022. Its totient is φ = 407614845103744.

The previous prime is 866181545846443. The next prime is 866181545846627. The reversal of 866181545846612 is 216648545181668.

It can be written as a sum of positive squares in 3 ways, for example, as 575325029852356 + 290856515994256 = 23985934^2 + 17054516^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 374645996183 + ... + 374645998494.

Almost surely, 2^{866181545846612} is an apocalyptic number.

It is an amenable number.

866181545846612 is a deficient number, since it is larger than the sum of its proper divisors (744046950716410).

866181545846612 is a wasteful number, since it uses less digits than its factorization.

866181545846612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749291994715 (or 749291994696 counting only the distinct ones).

The product of its digits is 530841600, while the sum is 71.

The spelling of 866181545846612 in words is "eight hundred sixty-six trillion, one hundred eighty-one billion, five hundred forty-five million, eight hundred forty-six thousand, six hundred twelve".