866802655166436 has 36 divisors (see below), whose sum is σ = 2232425706235452. Its totient is φ = 283482629361984.

The previous prime is 866802655166429. The next prime is 866802655166519. The reversal of 866802655166436 is 634661556208668.

866802655166436 is a `hidden beast` number, since 8 + 6 + 6 + 8 + 0 + 2 + 6 + 551 + 6 + 64 + 3 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 433486141308900 + 433316513857536 = 20820330^2 + 20816256^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (72) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227149540851 + ... + 227149544666.

It is an arithmetic number, because the mean of its divisors is an integer number (62011825173207).

Almost surely, 2^{866802655166436} is an apocalyptic number.

It is an amenable number.

866802655166436 is an abundant number, since it is smaller than the sum of its proper divisors (1365623051069016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

866802655166436 is a wasteful number, since it uses less digits than its factorization.

866802655166436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454299085580 (or 454299085575 counting only the distinct ones).

The product of its (nonzero) digits is 1791590400, while the sum is 72.

The spelling of 866802655166436 in words is "eight hundred sixty-six trillion, eight hundred two billion, six hundred fifty-five million, one hundred sixty-six thousand, four hundred thirty-six".