16642816 has 18 divisors (see below), whose sum is σ = 33221132. Its totient is φ = 8321280.

The previous prime is 16642799. The next prime is 16642819. The reversal of 16642816 is 61824661.

It is not an unprimeable number, because it can be changed into a prime (16642819) 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, 32250 + ... + 32761.

Almost surely, 2^16642816 is an apocalyptic number.

16642816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16642816 is a deficient number, since it is larger than the sum of its proper divisors (16578316).

16642816 is an frugal number, since it uses more digits than its factorization.

16642816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65027 (or 65013 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 16642816 is about 4079.5607606702. The cubic root of 16642816 is about 255.3145726902.

The spelling of 16642816 in words is "sixteen million, six hundred forty-two thousand, eight hundred sixteen".