16660145 has 16 divisors (see below), whose sum is σ = 20638800. Its totient is φ = 12902400.

The previous prime is 16660109. The next prime is 16660151. The reversal of 16660145 is 54106661.

It can be written as a sum of positive squares in 8 ways, for example, as 5895184 + 10764961 = 2428^2 + 3281^2 .

It is not a de Polignac number, because 16660145 - 2¹⁴ = 16643761 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36881 + ... + 37329.

It is an arithmetic number, because the mean of its divisors is an integer number (1289925).

Almost surely, 2^16660145 is an apocalyptic number.

It is an amenable number.

16660145 is a deficient number, since it is larger than the sum of its proper divisors (3978655).

16660145 is a wasteful number, since it uses less digits than its factorization.

16660145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 16660145 is about 4081.6840887065. The cubic root of 16660145 is about 255.4031556867.

The spelling of 16660145 in words is "sixteen million, six hundred sixty thousand, one hundred forty-five".