166040 has 32 divisors (see below), whose sum is σ = 427680. Its totient is φ = 56832.

The previous prime is 166031. The next prime is 166043. The reversal of 166040 is 40661.

166040 = 151² + 152² + ... + 157².

166040 is nontrivially palindromic in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17 + ... + 576.

It is an arithmetic number, because the mean of its divisors is an integer number (13365).

2¹⁶⁶⁰⁴⁰ is an apocalyptic number.

166040 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 166040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213840).

166040 is an abundant number, since it is smaller than the sum of its proper divisors (261640).

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

166040 is a wasteful number, since it uses less digits than its factorization.

166040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 166040 is about 407.4800608619. The cubic root of 166040 is about 54.9630605956.

The spelling of 166040 in words is "one hundred sixty-six thousand, forty".