16661208 has 32 divisors (see below), whose sum is σ = 41918400. Its totient is φ = 5518368.

The previous prime is 16661147. The next prime is 16661213. The reversal of 16661208 is 80216661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1783 + ... + 6041.

It is an arithmetic number, because the mean of its divisors is an integer number (1309950).

Almost surely, 2^16661208 is an apocalyptic number.

It is an amenable number.

16661208 is an abundant number, since it is smaller than the sum of its proper divisors (25257192).

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

16661208 is a wasteful number, since it uses less digits than its factorization.

16661208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431 (or 4427 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 16661208 is about 4081.8143024885. The cubic root of 16661208 is about 255.4085875678.

Adding to 16661208 its reverse (80216661), we get a palindrome (96877869).

The spelling of 16661208 in words is "sixteen million, six hundred sixty-one thousand, two hundred eight".