166684343358 has 128 divisors (see below), whose sum is σ = 387224893440. Its totient is φ = 47372544000.

The previous prime is 166684343351. The next prime is 166684343369. The reversal of 166684343358 is 853343486661.

It is a junction number, because it is equal to n+sod(n) for n = 166684343298 and 166684343307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166684343351) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58752316 + ... + 58755152.

It is an arithmetic number, because the mean of its divisors is an integer number (3025194480).

Almost surely, 2^166684343358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166684343358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193612446720).

166684343358 is an abundant number, since it is smaller than the sum of its proper divisors (220540550082).

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

166684343358 is a wasteful number, since it uses less digits than its factorization.

166684343358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682.

The product of its digits is 29859840, while the sum is 57.

The spelling of 166684343358 in words is "one hundred sixty-six billion, six hundred eighty-four million, three hundred forty-three thousand, three hundred fifty-eight".