166659066 has 64 divisors (see below), whose sum is σ = 424800000. Its totient is φ = 47443968.

The previous prime is 166659061. The next prime is 166659071. The reversal of 166659066 is 660956661.

It is an interprime number because it is at equal distance from previous prime (166659061) and next prime (166659071).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (166659061) 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, 132810 + ... + 134058.

It is an arithmetic number, because the mean of its divisors is an integer number (6637500).

Almost surely, 2^166659066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166659066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212400000).

166659066 is an abundant number, since it is smaller than the sum of its proper divisors (258140934).

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

166659066 is a wasteful number, since it uses less digits than its factorization.

166659066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 166659066 is about 12909.6501114476. The cubic root of 166659066 is about 550.3128424058.

The spelling of 166659066 in words is "one hundred sixty-six million, six hundred fifty-nine thousand, sixty-six".