166540120 has 16 divisors (see below), whose sum is σ = 374715360. Its totient is φ = 66616032.

The previous prime is 166540103. The next prime is 166540141. The reversal of 166540120 is 21045661.

It is a super-2 number, since 2×166540120² = 55471223139228800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2081712 + ... + 2081791.

It is an arithmetic number, because the mean of its divisors is an integer number (23419710).

Almost surely, 2^166540120 is an apocalyptic number.

166540120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166540120 is an abundant number, since it is smaller than the sum of its proper divisors (208175240).

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

166540120 is a wasteful number, since it uses less digits than its factorization.

166540120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4163514 (or 4163510 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 166540120 is about 12905.0424253468. The cubic root of 166540120 is about 550.1818902537.

Adding to 166540120 its reverse (21045661), we get a palindrome (187585781).

The spelling of 166540120 in words is "one hundred sixty-six million, five hundred forty thousand, one hundred twenty".