166547172007700 has 144 divisors (see below), whose sum is σ = 407869385938560. Its totient is φ = 58472586816000.

The previous prime is 166547172007673. The next prime is 166547172007813. The reversal of 166547172007700 is 7700271745661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1862628194 + ... + 1862717606.

It is an arithmetic number, because the mean of its divisors is an integer number (2832426291240).

Almost surely, 2^{166547172007700} is an apocalyptic number.

166547172007700 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 166547172007700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203934692969280).

166547172007700 is an abundant number, since it is smaller than the sum of its proper divisors (241322213930860).

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

166547172007700 is a wasteful number, since it uses less digits than its factorization.

166547172007700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147858 (or 147851 counting only the distinct ones).

The product of its (nonzero) digits is 3457440, while the sum is 53.

The spelling of 166547172007700 in words is "one hundred sixty-six trillion, five hundred forty-seven billion, one hundred seventy-two million, seven thousand, seven hundred".