16663530 has 32 divisors (see below), whose sum is σ = 43069824. Its totient is φ = 4101696.

The previous prime is 16663529. The next prime is 16663531. The reversal of 16663530 is 3536661.

It is an interprime number because it is at equal distance from previous prime (16663529) and next prime (16663531).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (16663531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20974 + ... + 21753.

It is an arithmetic number, because the mean of its divisors is an integer number (1345932).

Almost surely, 2^16663530 is an apocalyptic number.

16663530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16663530 is an abundant number, since it is smaller than the sum of its proper divisors (26406294).

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

16663530 is a wasteful number, since it uses less digits than its factorization.

16663530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42750.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 16663530 is about 4082.0987249208. The cubic root of 16663530 is about 255.4204520775.

The spelling of 16663530 in words is "sixteen million, six hundred sixty-three thousand, five hundred thirty".