166785912 has 128 divisors (see below), whose sum is σ = 500385600. Its totient is φ = 51277824.

The previous prime is 166785893. The next prime is 166785917. The reversal of 166785912 is 219587661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166785917) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194188 + ... + 195044.

Almost surely, 2^166785912 is an apocalyptic number.

166785912 is a gapful number since it is divisible by the number (12) 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 166785912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250192800).

166785912 is an abundant number, since it is smaller than the sum of its proper divisors (333599688).

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

166785912 is a wasteful number, since it uses less digits than its factorization.

166785912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 932 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 166785912 is about 12914.5620134792. The cubic root of 166785912 is about 550.4524233323.

The spelling of 166785912 in words is "one hundred sixty-six million, seven hundred eighty-five thousand, nine hundred twelve".