16616648 has 8 divisors (see below), whose sum is σ = 31156230. Its totient is φ = 8308320.

The previous prime is 16616647. The next prime is 16616657. The reversal of 16616648 is 84661661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8988004 + 7628644 = 2998^2 + 2762^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×16616648² = 552225981511808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16616647) 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 as a sum of consecutive naturals, namely, 1038533 + ... + 1038548.

Almost surely, 2^16616648 is an apocalyptic number.

It is an amenable number.

16616648 is a deficient number, since it is larger than the sum of its proper divisors (14539582).

16616648 is a wasteful number, since it uses less digits than its factorization.

16616648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077087 (or 2077083 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 16616648 is about 4076.3522909582. The cubic root of 16616648 is about 255.1806895698.

The spelling of 16616648 in words is "sixteen million, six hundred sixteen thousand, six hundred forty-eight".