16663488 has 56 divisors (see below), whose sum is σ = 44866560. Its totient is φ = 5456640.

The previous prime is 16663483. The next prime is 16663499. The reversal of 16663488 is 88436661.

It is a happy number.

16663488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16663488² = 555343664652288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10593 + ... + 12063.

Almost surely, 2^16663488 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 16663488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22433280).

16663488 is an abundant number, since it is smaller than the sum of its proper divisors (28203072).

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

16663488 is a wasteful number, since it uses less digits than its factorization.

16663488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545 (or 1535 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 16663488 is about 4082.0935805050. The cubic root of 16663488 is about 255.4202374837.

The spelling of 16663488 in words is "sixteen million, six hundred sixty-three thousand, four hundred eighty-eight".