166666782858 has 32 divisors (see below), whose sum is σ = 335931976512. Its totient is φ = 55122662400.

The previous prime is 166666782857. The next prime is 166666782889. The reversal of 166666782858 is 858287666661.

It is a junction number, because it is equal to n+sod(n) for n = 166666782792 and 166666782801.

It is not an unprimeable number, because it can be changed into a prime (166666782857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6448810 + ... + 6474602.

It is an arithmetic number, because the mean of its divisors is an integer number (10497874266).

Almost surely, 2^166666782858 is an apocalyptic number.

166666782858 is an abundant number, since it is smaller than the sum of its proper divisors (169265193654).

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

166666782858 is a wasteful number, since it uses less digits than its factorization.

166666782858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34150.

The product of its digits is 278691840, while the sum is 69.

The spelling of 166666782858 in words is "one hundred sixty-six billion, six hundred sixty-six million, seven hundred eighty-two thousand, eight hundred fifty-eight".