166655911680 has 216 divisors, whose sum is σ = 582214415328. Its totient is φ = 44009791488.

The previous prime is 166655911679. The next prime is 166655911699. The reversal of 166655911680 is 86119556661.

166655911680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1116334 + ... + 1256786.

It is an arithmetic number, because the mean of its divisors is an integer number (2695437108).

Almost surely, 2^166655911680 is an apocalyptic number.

166655911680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166655911680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291107207664).

166655911680 is an abundant number, since it is smaller than the sum of its proper divisors (415558503648).

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

166655911680 is a wasteful number, since it uses less digits than its factorization.

166655911680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140583 (or 140566 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 54.

The spelling of 166655911680 in words is "one hundred sixty-six billion, six hundred fifty-five million, nine hundred eleven thousand, six hundred eighty".