166451140 has 12 divisors (see below), whose sum is σ = 349547436. Its totient is φ = 66580448.

The previous prime is 166451137. The next prime is 166451141. The reversal of 166451140 is 41154661.

It can be written as a sum of positive squares in 2 ways, for example, as 111809476 + 54641664 = 10574^2 + 7392^2 .

It is a junction number, because it is equal to n+sod(n) for n = 166451099 and 166451108.

It is not an unprimeable number, because it can be changed into a prime (166451141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4161259 + ... + 4161298.

It is an arithmetic number, because the mean of its divisors is an integer number (29128953).

Almost surely, 2^166451140 is an apocalyptic number.

166451140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166451140 is an abundant number, since it is smaller than the sum of its proper divisors (183096296).

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

166451140 is a wasteful number, since it uses less digits than its factorization.

166451140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8322566 (or 8322564 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 166451140 is about 12901.5944751027. The cubic root of 166451140 is about 550.0838880309.

The spelling of 166451140 in words is "one hundred sixty-six million, four hundred fifty-one thousand, one hundred forty".