16664523 has 8 divisors (see below), whose sum is σ = 22243728. Its totient is φ = 11097504.

The previous prime is 16664519. The next prime is 16664551. The reversal of 16664523 is 32546661.

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

It is not a de Polignac number, because 16664523 - 2² = 16664519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16664563) 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, 865 + ... + 5837.

It is an arithmetic number, because the mean of its divisors is an integer number (2780466).

Almost surely, 2^16664523 is an apocalyptic number.

16664523 is a deficient number, since it is larger than the sum of its proper divisors (5579205).

16664523 is a wasteful number, since it uses less digits than its factorization.

16664523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6093.

The product of its digits is 25920, while the sum is 33.

The square root of 16664523 is about 4082.2203517204. The cubic root of 16664523 is about 255.4255255817.

The spelling of 16664523 in words is "sixteen million, six hundred sixty-four thousand, five hundred twenty-three".