166641388904 has 32 divisors (see below), whose sum is σ = 328985328000. Its totient is φ = 78914310912.

The previous prime is 166641388853. The next prime is 166641388909. The reversal of 166641388904 is 409883146661.

166641388904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 166641388904.

It is not an unprimeable number, because it can be changed into a prime (166641388909) 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 7 ways as a sum of consecutive naturals, for example, 432017 + ... + 721055.

It is an arithmetic number, because the mean of its divisors is an integer number (10280791500).

Almost surely, 2^166641388904 is an apocalyptic number.

It is an amenable number.

166641388904 is a deficient number, since it is larger than the sum of its proper divisors (162343939096).

166641388904 is a wasteful number, since it uses less digits than its factorization.

166641388904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292857 (or 292853 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 56.

The spelling of 166641388904 in words is "one hundred sixty-six billion, six hundred forty-one million, three hundred eighty-eight thousand, nine hundred four".