166401380684 has 48 divisors (see below), whose sum is σ = 365916364800. Its totient is φ = 64321205760.

The previous prime is 166401380683. The next prime is 166401380713. The reversal of 166401380684 is 486083104661.

166401380684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (166401380683) 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 15 ways as a sum of consecutive naturals, for example, 2087909 + ... + 2166140.

It is an arithmetic number, because the mean of its divisors is an integer number (7623257600).

Almost surely, 2^166401380684 is an apocalyptic number.

166401380684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

166401380684 is an abundant number, since it is smaller than the sum of its proper divisors (199514984116).

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

166401380684 is a wasteful number, since it uses less digits than its factorization.

166401380684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4254198 (or 4254196 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The spelling of 166401380684 in words is "one hundred sixty-six billion, four hundred one million, three hundred eighty thousand, six hundred eighty-four".