166671005720 has 16 divisors (see below), whose sum is σ = 375009762960. Its totient is φ = 66668402272.

The previous prime is 166671005707. The next prime is 166671005729. The reversal of 166671005720 is 27500176661.

166671005720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166671005729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2083387532 + ... + 2083387611.

It is an arithmetic number, because the mean of its divisors is an integer number (23438110185).

Almost surely, 2^166671005720 is an apocalyptic number.

166671005720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166671005720 is an abundant number, since it is smaller than the sum of its proper divisors (208338757240).

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

166671005720 is a wasteful number, since it uses less digits than its factorization.

166671005720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4166775154 (or 4166775150 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 166671005720 in words is "one hundred sixty-six billion, six hundred seventy-one million, five thousand, seven hundred twenty".