166385000 has 80 divisors (see below), whose sum is σ = 394748640. Its totient is φ = 65720000.

The previous prime is 166384963. The next prime is 166385027. The reversal of 166385000 is 583661.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 534845 + ... + 535155.

It is an arithmetic number, because the mean of its divisors is an integer number (4934358).

Almost surely, 2^166385000 is an apocalyptic number.

166385000 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 166385000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197374320).

166385000 is an abundant number, since it is smaller than the sum of its proper divisors (228363640).

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

166385000 is a wasteful number, since it uses less digits than its factorization.

166385000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 166385000 is about 12899.0309713559. The cubic root of 166385000 is about 550.0110190630.

The spelling of 166385000 in words is "one hundred sixty-six million, three hundred eighty-five thousand".