166232540 has 48 divisors (see below), whose sum is σ = 362444544. Its totient is φ = 63974400.

The previous prime is 166232419. The next prime is 166232543. The reversal of 166232540 is 45232661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166232543) by changing a digit.

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, 121460 + ... + 122820.

It is an arithmetic number, because the mean of its divisors is an integer number (7550928).

Almost surely, 2^166232540 is an apocalyptic number.

166232540 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 166232540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181222272).

166232540 is an abundant number, since it is smaller than the sum of its proper divisors (196212004).

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

166232540 is a wasteful number, since it uses less digits than its factorization.

166232540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 166232540 is about 12893.1198706907. The cubic root of 166232540 is about 549.8429744571.

The spelling of 166232540 in words is "one hundred sixty-six million, two hundred thirty-two thousand, five hundred forty".