16447664 has 20 divisors (see below), whose sum is σ = 32163120. Its totient is φ = 8147520.

The previous prime is 16447657. The next prime is 16447667. The reversal of 16447664 is 46674461.

It is not an unprimeable number, because it can be changed into a prime (16447667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2972 + ... + 6459.

It is an arithmetic number, because the mean of its divisors is an integer number (1608156).

Almost surely, 2^16447664 is an apocalyptic number.

It is an amenable number.

16447664 is a deficient number, since it is larger than the sum of its proper divisors (15715456).

16447664 is a wasteful number, since it uses less digits than its factorization.

16447664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9548 (or 9542 counting only the distinct ones).

The product of its digits is 96768, while the sum is 38.

The square root of 16447664 is about 4055.5719695254. The cubic root of 16447664 is about 254.3127154644.

The spelling of 16447664 in words is "sixteen million, four hundred forty-seven thousand, six hundred sixty-four".