166437140 has 48 divisors (see below), whose sum is σ = 382040064. Its totient is φ = 60633600.

The previous prime is 166437127. The next prime is 166437197. The reversal of 166437140 is 41734661.

It is a junction number, because it is equal to n+sod(n) for n = 166437097 and 166437106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2645 + ... + 18435.

It is an arithmetic number, because the mean of its divisors is an integer number (7959168).

Almost surely, 2^166437140 is an apocalyptic number.

166437140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166437140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191020032).

166437140 is an abundant number, since it is smaller than the sum of its proper divisors (215602924).

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

166437140 is a wasteful number, since it uses less digits than its factorization.

166437140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15848 (or 15846 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 166437140 is about 12901.0518950975. The cubic root of 166437140 is about 550.0684653061.

The spelling of 166437140 in words is "one hundred sixty-six million, four hundred thirty-seven thousand, one hundred forty".