16669644 has 24 divisors (see below), whose sum is σ = 39299568. Its totient is φ = 5498880.

The previous prime is 16669643. The next prime is 16669651. The reversal of 16669644 is 44696661.

It is a super-3 number, since 3×16669644³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16669596 and 16669605.

It is not an unprimeable number, because it can be changed into a prime (16669643) 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, 5997 + ... + 8324.

It is an arithmetic number, because the mean of its divisors is an integer number (1637482).

Almost surely, 2^16669644 is an apocalyptic number.

It is an amenable number.

16669644 is an abundant number, since it is smaller than the sum of its proper divisors (22629924).

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

16669644 is a wasteful number, since it uses less digits than its factorization.

16669644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14425 (or 14423 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 16669644 is about 4082.8475357280. The cubic root of 16669644 is about 255.4516869497.

The spelling of 16669644 in words is "sixteen million, six hundred sixty-nine thousand, six hundred forty-four".