166912327680 has 368 divisors, whose sum is σ = 612032766720. Its totient is φ = 38050725888.

The previous prime is 166912327639. The next prime is 166912327691. The reversal of 166912327680 is 86723219661.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 440401731 + ... + 440402109.

Almost surely, 2^166912327680 is an apocalyptic number.

166912327680 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 166912327680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306016383360).

166912327680 is an abundant number, since it is smaller than the sum of its proper divisors (445120439040).

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

166912327680 is an frugal number, since it uses more digits than its factorization.

166912327680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 51.

The spelling of 166912327680 in words is "one hundred sixty-six billion, nine hundred twelve million, three hundred twenty-seven thousand, six hundred eighty".