16664616 has 40 divisors (see below), whose sum is σ = 46678170. Its totient is φ = 5554656.

The previous prime is 16664611. The next prime is 16664617. The reversal of 16664616 is 61646661.

It can be written as a sum of positive squares in only one way, i.e., 13616100 + 3048516 = 3690^2 + 1746^2 .

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

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

It is not an unprimeable number, because it can be changed into a prime (16664611) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 12211 + ... + 13506.

Almost surely, 2^16664616 is an apocalyptic number.

It is an amenable number.

16664616 is an abundant number, since it is smaller than the sum of its proper divisors (30013554).

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

16664616 is a wasteful number, since it uses less digits than its factorization.

16664616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25735 (or 25722 counting only the distinct ones).

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

The square root of 16664616 is about 4082.2317425644. The cubic root of 16664616 is about 255.4260007334.

The spelling of 16664616 in words is "sixteen million, six hundred sixty-four thousand, six hundred sixteen".