16663712 has 48 divisors (see below), whose sum is σ = 36229032. Its totient is φ = 7495680.

The previous prime is 16663697. The next prime is 16663763. The reversal of 16663712 is 21736661.

It can be written as a sum of positive squares in 4 ways, for example, as 11262736 + 5400976 = 3356^2 + 2324^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16568 + ... + 17544.

Almost surely, 2^16663712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16663712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18114516).

16663712 is an abundant number, since it is smaller than the sum of its proper divisors (19565320).

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

16663712 is a wasteful number, since it uses less digits than its factorization.

16663712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041 (or 1033 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 16663712 is about 4082.1210173144. The cubic root of 16663712 is about 255.4213819795.

The spelling of 16663712 in words is "sixteen million, six hundred sixty-three thousand, seven hundred twelve".