16663520 has 24 divisors (see below), whose sum is σ = 39367944. Its totient is φ = 6665344.

The previous prime is 16663511. The next prime is 16663529. The reversal of 16663520 is 2536661.

It is an interprime number because it is at equal distance from previous prime (16663511) and next prime (16663529).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16663529) by changing a digit.

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, 51914 + ... + 52233.

It is an arithmetic number, because the mean of its divisors is an integer number (1640331).

Almost surely, 2^16663520 is an apocalyptic number.

16663520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16663520 is an abundant number, since it is smaller than the sum of its proper divisors (22704424).

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

16663520 is a wasteful number, since it uses less digits than its factorization.

16663520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104162 (or 104154 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 16663520 is about 4082.0975000605. The cubic root of 16663520 is about 255.4204009837.

The spelling of 16663520 in words is "sixteen million, six hundred sixty-three thousand, five hundred twenty".