166018158 has 48 divisors (see below), whose sum is σ = 383494176. Its totient is φ = 51724800.

The previous prime is 166018129. The next prime is 166018159. The reversal of 166018158 is 851810661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166018159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44410 + ... + 48002.

It is an arithmetic number, because the mean of its divisors is an integer number (7989462).

Almost surely, 2^166018158 is an apocalyptic number.

166018158 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 166018158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191747088).

166018158 is an abundant number, since it is smaller than the sum of its proper divisors (217476018).

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

166018158 is a wasteful number, since it uses less digits than its factorization.

166018158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3769 (or 3766 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 166018158 is about 12884.8033745184. The cubic root of 166018158 is about 549.6065042167.

It can be divided in two parts, 166018 and 158, that added together give a triangular number (166176 = T₅₇₆).

The spelling of 166018158 in words is "one hundred sixty-six million, eighteen thousand, one hundred fifty-eight".