166632678500 has 96 divisors (see below), whose sum is σ = 367934767200. Its totient is φ = 65920320000.

The previous prime is 166632678497. The next prime is 166632678529. The reversal of 166632678500 is 5876236661.

It can be written as a sum of positive squares in 16 ways, for example, as 53295416164 + 113337262336 = 230858^2 + 336656^2 .

It is a super-3 number, since 3×166632678500³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85495526 + ... + 85497474.

It is an arithmetic number, because the mean of its divisors is an integer number (3832653825).

Almost surely, 2^166632678500 is an apocalyptic number.

166632678500 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 166632678500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183967383600).

166632678500 is an abundant number, since it is smaller than the sum of its proper divisors (201302088700).

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

166632678500 is a wasteful number, since it uses less digits than its factorization.

166632678500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3762 (or 3750 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 166632678500 in words is "one hundred sixty-six billion, six hundred thirty-two million, six hundred seventy-eight thousand, five hundred".