166500500 has 48 divisors (see below), whose sum is σ = 367492944. Its totient is φ = 65894400.

The previous prime is 166500493. The next prime is 166500527. The reversal of 166500500 is 5005661.

It can be written as a sum of positive squares in 8 ways, for example, as 71944324 + 94556176 = 8482^2 + 9724^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46784 + ... + 50216.

It is an arithmetic number, because the mean of its divisors is an integer number (7656103).

Almost surely, 2^166500500 is an apocalyptic number.

166500500 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 166500500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183746472).

166500500 is an abundant number, since it is smaller than the sum of its proper divisors (200992444).

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

166500500 is a wasteful number, since it uses less digits than its factorization.

166500500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549 (or 3537 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 166500500 is about 12903.5072751559. The cubic root of 166500500 is about 550.1382572534.

The spelling of 166500500 in words is "one hundred sixty-six million, five hundred thousand, five hundred".