16662144 has 32 divisors (see below), whose sum is σ = 44259840. Its totient is φ = 5553920.

The previous prime is 16662103. The next prime is 16662157. The reversal of 16662144 is 44126661.

It is a tau number, because it is divible by the number of its divisors (32).

It is a nude number because it is divisible by every one of its digits.

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 3 ways as a sum of consecutive naturals, for example, 21312 + ... + 22079.

It is an arithmetic number, because the mean of its divisors is an integer number (1383120).

Almost surely, 2^16662144 is an apocalyptic number.

It is an amenable number.

16662144 is an abundant number, since it is smaller than the sum of its proper divisors (27597696).

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

16662144 is an equidigital number, since it uses as much as digits as its factorization.

16662144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43408 (or 43396 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 16662144 is about 4081.9289557757. The cubic root of 16662144 is about 255.4133702934.

The spelling of 16662144 in words is "sixteen million, six hundred sixty-two thousand, one hundred forty-four".