166681818360 has 64 divisors (see below), whose sum is σ = 555606064800. Its totient is φ = 44448484608.

The previous prime is 166681818353. The next prime is 166681818427. The reversal of 166681818360 is 63818186661.

166681818360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 166681818297 and 166681818306.

It is a congruent number.

It is an unprimeable number.

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, 77166429 + ... + 77168588.

Almost surely, 2^166681818360 is an apocalyptic number.

166681818360 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166681818360 is an abundant number, since it is smaller than the sum of its proper divisors (388924246440).

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

166681818360 is a wasteful number, since it uses less digits than its factorization.

166681818360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154335037 (or 154335027 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 166681818360 in words is "one hundred sixty-six billion, six hundred eighty-one million, eight hundred eighteen thousand, three hundred sixty".