866802655166378 has 16 divisors (see below), whose sum is σ = 1485948095903040. Its totient is φ = 371486680452576.

The previous prime is 866802655166353. The next prime is 866802655166429. The reversal of 866802655166378 is 873661556208668.

It is a junction number, because it is equal to n+sod(n) for n = 866802655166299 and 866802655166308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19860758 + ... + 46130846.

It is an arithmetic number, because the mean of its divisors is an integer number (92871755993940).

Almost surely, 2^{866802655166378} is an apocalyptic number.

866802655166378 is a deficient number, since it is larger than the sum of its proper divisors (619145440736662).

866802655166378 is a wasteful number, since it uses less digits than its factorization.

866802655166378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28626941.

The product of its (nonzero) digits is 4180377600, while the sum is 77.

The spelling of 866802655166378 in words is "eight hundred sixty-six trillion, eight hundred two billion, six hundred fifty-five million, one hundred sixty-six thousand, three hundred seventy-eight".