866802166064320 has 28 divisors (see below), whose sum is σ = 2064072657941424. Its totient is φ = 346720866425600.

The previous prime is 866802166064293. The next prime is 866802166064321. The reversal of 866802166064320 is 23460661208668.

It is not an unprimeable number, because it can be changed into a prime (866802166064321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354378384156 + ... + 1354378384795.

Almost surely, 2^{866802166064320} is an apocalyptic number.

866802166064320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

866802166064320 is an abundant number, since it is smaller than the sum of its proper divisors (1197270491877104).

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

866802166064320 is a wasteful number, since it uses less digits than its factorization.

866802166064320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708756768968 (or 2708756768958 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 58.

The spelling of 866802166064320 in words is "eight hundred sixty-six trillion, eight hundred two billion, one hundred sixty-six million, sixty-four thousand, three hundred twenty".