16971664 has 20 divisors (see below), whose sum is σ = 33423580. Its totient is φ = 8346240.

The previous prime is 16971637. The next prime is 16971667. The reversal of 16971664 is 46617961.

It can be written as a sum of positive squares in 2 ways, for example, as 4665600 + 12306064 = 2160^2 + 3508^2 .

It is not an unprimeable number, because it can be changed into a prime (16971667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7719 + ... + 9670.

It is an arithmetic number, because the mean of its divisors is an integer number (1671179).

Almost surely, 2^16971664 is an apocalyptic number.

It is an amenable number.

16971664 is a deficient number, since it is larger than the sum of its proper divisors (16451916).

16971664 is a wasteful number, since it uses less digits than its factorization.

16971664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17458 (or 17452 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 16971664 is about 4119.6679477841. The cubic root of 16971664 is about 256.9852171949.

The spelling of 16971664 in words is "sixteen million, nine hundred seventy-one thousand, six hundred sixty-four".