166587746 has 16 divisors (see below), whose sum is σ = 269385144. Its totient is φ = 76806144.

The previous prime is 166587721. The next prime is 166587749. The reversal of 166587746 is 647785661.

It can be written as a sum of positive squares in 4 ways, for example, as 162282121 + 4305625 = 12739^2 + 2075^2 .

It is a junction number, because it is equal to n+sod(n) for n = 166587694 and 166587703.

It is not an unprimeable number, because it can be changed into a prime (166587749) 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 7 ways as a sum of consecutive naturals, for example, 27200 + ... + 32756.

Almost surely, 2^166587746 is an apocalyptic number.

166587746 is a deficient number, since it is larger than the sum of its proper divisors (102797398).

166587746 is a wasteful number, since it uses less digits than its factorization.

166587746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6725.

The product of its digits is 1693440, while the sum is 50.

The square root of 166587746 is about 12906.8875411541. The cubic root of 166587746 is about 550.2343310016.

The spelling of 166587746 in words is "one hundred sixty-six million, five hundred eighty-seven thousand, seven hundred forty-six".