166195184958 has 96 divisors (see below), whose sum is σ = 398864898432. Its totient is φ = 49591828800.

The previous prime is 166195184951. The next prime is 166195184993. The reversal of 166195184958 is 859481591661.

166195184958 is a `hidden beast` number, since 1 + 6 + 61 + 9 + 518 + 4 + 9 + 58 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 166195184895 and 166195184904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166195184951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5028768 + ... + 5061708.

It is an arithmetic number, because the mean of its divisors is an integer number (4154842692).

Almost surely, 2^166195184958 is an apocalyptic number.

166195184958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 166195184958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199432449216).

166195184958 is an abundant number, since it is smaller than the sum of its proper divisors (232669713474).

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

166195184958 is a wasteful number, since it uses less digits than its factorization.

166195184958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33350 (or 33347 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 63.

It can be divided in two parts, 166195 and 184958, that added together give a palindrome (351153).

The spelling of 166195184958 in words is "one hundred sixty-six billion, one hundred ninety-five million, one hundred eighty-four thousand, nine hundred fifty-eight".