166486782 has 64 divisors (see below), whose sum is σ = 419904000. Its totient is φ = 42746880.

The previous prime is 166486781. The next prime is 166486813. The reversal of 166486782 is 287684661.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166486781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39094 + ... + 43142.

It is an arithmetic number, because the mean of its divisors is an integer number (6561000).

Almost surely, 2^166486782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166486782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209952000).

166486782 is an abundant number, since it is smaller than the sum of its proper divisors (253417218).

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

166486782 is a wasteful number, since it uses less digits than its factorization.

166486782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4161.

The product of its digits is 774144, while the sum is 48.

The square root of 166486782 is about 12902.9757033019. The cubic root of 166486782 is about 550.1231481819.

The spelling of 166486782 in words is "one hundred sixty-six million, four hundred eighty-six thousand, seven hundred eighty-two".