166804170680 has 256 divisors, whose sum is σ = 468340392960. Its totient is φ = 52164403200.

The previous prime is 166804170677. The next prime is 166804170779. The reversal of 166804170680 is 86071408661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26809970 + ... + 26816190.

It is an arithmetic number, because the mean of its divisors is an integer number (1829454660).

Almost surely, 2^166804170680 is an apocalyptic number.

166804170680 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 166804170680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234170196480).

166804170680 is an abundant number, since it is smaller than the sum of its proper divisors (301536222280).

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

166804170680 is a wasteful number, since it uses less digits than its factorization.

166804170680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6430 (or 6426 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 166804170680 in words is "one hundred sixty-six billion, eight hundred four million, one hundred seventy thousand, six hundred eighty".