166141440 has 120 divisors (see below), whose sum is σ = 575474328. Its totient is φ = 44298240.

The previous prime is 166141439. The next prime is 166141483. The reversal of 166141440 is 44141661.

166141440 is a `hidden beast` number, since 1 + 6 + 614 + 1 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19435 + ... + 26645.

Almost surely, 2^166141440 is an apocalyptic number.

166141440 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 166141440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287737164).

166141440 is an abundant number, since it is smaller than the sum of its proper divisors (409332888).

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

166141440 is an equidigital number, since it uses as much as digits as its factorization.

166141440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7240 (or 7221 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 166141440 is about 12889.5864945312. The cubic root of 166141440 is about 549.7425130831.

The spelling of 166141440 in words is "one hundred sixty-six million, one hundred forty-one thousand, four hundred forty".