866313853180685 has 64 divisors (see below), whose sum is σ = 1301776970941440. Its totient is φ = 538810092564480.

The previous prime is 866313853180631. The next prime is 866313853180687. The reversal of 866313853180685 is 586081358313668.

It is not a de Polignac number, because 866313853180685 - 2¹⁴ = 866313853164301 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866313853180687) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11406821 + ... + 43159509.

It is an arithmetic number, because the mean of its divisors is an integer number (20340265170960).

Almost surely, 2^{866313853180685} is an apocalyptic number.

It is an amenable number.

866313853180685 is a deficient number, since it is larger than the sum of its proper divisors (435463117760755).

866313853180685 is a wasteful number, since it uses less digits than its factorization.

866313853180685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31753758.

The product of its (nonzero) digits is 597196800, while the sum is 71.

The spelling of 866313853180685 in words is "eight hundred sixty-six trillion, three hundred thirteen billion, eight hundred fifty-three million, one hundred eighty thousand, six hundred eighty-five".