16659473 has 4 divisors (see below), whose sum is σ = 17639460. Its totient is φ = 15679488.

The previous prime is 16659463. The next prime is 16659481. The reversal of 16659473 is 37495661.

16659473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10647169 + 6012304 = 3263^2 + 2452^2 .

It is a cyclic number.

It is not a de Polignac number, because 16659473 - 2⁸ = 16659217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16659473.

It is not an unprimeable number, because it can be changed into a prime (16659413) 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, 489968 + ... + 490001.

It is an arithmetic number, because the mean of its divisors is an integer number (4409865).

Almost surely, 2^16659473 is an apocalyptic number.

It is an amenable number.

16659473 is a deficient number, since it is larger than the sum of its proper divisors (979987).

16659473 is an equidigital number, since it uses as much as digits as its factorization.

16659473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979986.

The product of its digits is 136080, while the sum is 41.

The square root of 16659473 is about 4081.6017689138. The cubic root of 16659473 is about 255.3997216784.

The spelling of 16659473 in words is "sixteen million, six hundred fifty-nine thousand, four hundred seventy-three".