166740 has 48 divisors (see below), whose sum is σ = 534912. Its totient is φ = 38016.

The previous prime is 166739. The next prime is 166741. The reversal of 166740 is 47661.

166740 = T₃₁ + T₃₂ + ... + T₁₀₀.

It is an interprime number because it is at equal distance from previous prime (166739) and next prime (166741).

It is a self number, because there is not a number n which added to its sum of digits gives 166740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222 + ... + 618.

It is an arithmetic number, because the mean of its divisors is an integer number (11144).

2¹⁶⁶⁷⁴⁰ is an apocalyptic number.

166740 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 166740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267456).

166740 is an abundant number, since it is smaller than the sum of its proper divisors (368172).

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

166740 is a wasteful number, since it uses less digits than its factorization.

166740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 414 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 166740 is about 408.3380952103. The cubic root of 166740 is about 55.0401910091.

The spelling of 166740 in words is "one hundred sixty-six thousand, seven hundred forty".