16665125 has 8 divisors (see below), whose sum is σ = 20798232. Its totient is φ = 13332000.

The previous prime is 16665043. The next prime is 16665137. The reversal of 16665125 is 52156661.

It can be written as a sum of positive squares in 4 ways, for example, as 2401 + 16662724 = 49^2 + 4082^2 .

It is not a de Polignac number, because 16665125 - 2¹⁴ = 16648741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16665091 and 16665100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66536 + ... + 66785.

It is an arithmetic number, because the mean of its divisors is an integer number (2599779).

Almost surely, 2^16665125 is an apocalyptic number.

It is an amenable number.

16665125 is a deficient number, since it is larger than the sum of its proper divisors (4133107).

16665125 is an equidigital number, since it uses as much as digits as its factorization.

16665125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133336 (or 133326 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 16665125 is about 4082.2940854377. The cubic root of 16665125 is about 255.4286012636.

The spelling of 16665125 in words is "sixteen million, six hundred sixty-five thousand, one hundred twenty-five".