16663608 has 96 divisors (see below), whose sum is σ = 51214800. Its totient is φ = 4852224.

The previous prime is 16663607. The next prime is 16663609. The reversal of 16663608 is 80636661.

16663608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16663607) and next prime (16663609).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17316 + ... + 18252.

Almost surely, 2^16663608 is an apocalyptic number.

16663608 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16663608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25607400).

16663608 is an abundant number, since it is smaller than the sum of its proper divisors (34551192).

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

16663608 is a wasteful number, since it uses less digits than its factorization.

16663608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 16663608 is about 4082.1082788187. The cubic root of 16663608 is about 255.4208506078.

It can be divided in two parts, 16663 and 608, that added together give a palindrome (17271).

The spelling of 16663608 in words is "sixteen million, six hundred sixty-three thousand, six hundred eight".