166516650 has 144 divisors (see below), whose sum is σ = 469159704. Its totient is φ = 42301440.

The previous prime is 166516643. The next prime is 166516657. The reversal of 166516650 is 56615661.

It is an interprime number because it is at equal distance from previous prime (166516643) and next prime (166516657).

It can be written as a sum of positive squares in 12 ways, for example, as 46416969 + 120099681 = 6813^2 + 10959^2 .

It is not an unprimeable number, because it can be changed into a prime (166516657) 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 71 ways as a sum of consecutive naturals, for example, 1215382 + ... + 1215518.

Almost surely, 2^166516650 is an apocalyptic number.

166516650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166516650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234579852).

166516650 is an abundant number, since it is smaller than the sum of its proper divisors (302643054).

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

166516650 is a wasteful number, since it uses less digits than its factorization.

166516650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 166516650 is about 12904.1330588304. The cubic root of 166516650 is about 550.1560438779.

The spelling of 166516650 in words is "one hundred sixty-six million, five hundred sixteen thousand, six hundred fifty".