1666822206368 has 48 divisors (see below), whose sum is σ = 3580005268224. Its totient is φ = 757619842560.

The previous prime is 1666822206281. The next prime is 1666822206373. The reversal of 1666822206368 is 8636022286661.

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, 12767921 + ... + 12897807.

It is an arithmetic number, because the mean of its divisors is an integer number (74583443088).

Almost surely, 2^{1666822206368} is an apocalyptic number.

It is an amenable number.

1666822206368 is an abundant number, since it is smaller than the sum of its proper divisors (1913183061856).

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

1666822206368 is a wasteful number, since it uses less digits than its factorization.

1666822206368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166365 (or 166357 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 56.

The spelling of 1666822206368 in words is "one trillion, six hundred sixty-six billion, eight hundred twenty-two million, two hundred six thousand, three hundred sixty-eight".