166535050500 has 1296 divisors, whose sum is σ = 684122559120. Its totient is φ = 33965568000.

The previous prime is 166535050489. The next prime is 166535050529. The reversal of 166535050500 is 5050535661.

166535050500 is a `hidden beast` number, since 1 + 6 + 6 + 53 + 50 + 50 + 500 = 666.

It can be written as a sum of positive squares in 24 ways, for example, as 142281348804 + 24253701696 = 377202^2 + 155736^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 431 ways as a sum of consecutive naturals, for example, 1527844446 + ... + 1527844554.

It is an arithmetic number, because the mean of its divisors is an integer number (527872345).

Almost surely, 2^166535050500 is an apocalyptic number.

166535050500 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 166535050500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342061279560).

166535050500 is an abundant number, since it is smaller than the sum of its proper divisors (517587508620).

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

166535050500 is a wasteful number, since it uses less digits than its factorization.

166535050500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 67500, while the sum is 36.

The spelling of 166535050500 in words is "one hundred sixty-six billion, five hundred thirty-five million, fifty thousand, five hundred".