16664738 has 8 divisors (see below), whose sum is σ = 25086288. Its totient is φ = 8302644.

The previous prime is 16664731. The next prime is 16664741. The reversal of 16664738 is 83746661.

16664738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 16664695 and 16664704.

It is not an unprimeable number, because it can be changed into a prime (16664731) 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, 14156 + ... + 15287.

It is an arithmetic number, because the mean of its divisors is an integer number (3135786).

Almost surely, 2^16664738 is an apocalyptic number.

16664738 is a deficient number, since it is larger than the sum of its proper divisors (8421550).

16664738 is a wasteful number, since it uses less digits than its factorization.

16664738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29728.

The product of its digits is 145152, while the sum is 41.

The square root of 16664738 is about 4082.2466853437. The cubic root of 16664738 is about 255.4266240480.

The spelling of 16664738 in words is "sixteen million, six hundred sixty-four thousand, seven hundred thirty-eight".