166871240 has 16 divisors (see below), whose sum is σ = 375460380. Its totient is φ = 66748480.

The previous prime is 166871239. The next prime is 166871297. The reversal of 166871240 is 42178661.

It can be written as a sum of positive squares in 2 ways, for example, as 162766564 + 4104676 = 12758^2 + 2026^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 166871240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2085851 + ... + 2085930.

Almost surely, 2^166871240 is an apocalyptic number.

166871240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166871240 is an abundant number, since it is smaller than the sum of its proper divisors (208589140).

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

166871240 is a wasteful number, since it uses less digits than its factorization.

166871240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4171792 (or 4171788 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 166871240 is about 12917.8651487001. The cubic root of 166871240 is about 550.5462781755.

The spelling of 166871240 in words is "one hundred sixty-six million, eight hundred seventy-one thousand, two hundred forty".