16657013 has 6 divisors (see below), whose sum is σ = 17212662. Its totient is φ = 16118760.

The previous prime is 16657009. The next prime is 16657019. The reversal of 16657013 is 31075661.

It can be written as a sum of positive squares in only one way, i.e., 10195249 + 6461764 = 3193^2 + 2542^2 .

It is not a de Polignac number, because 16657013 - 2² = 16657009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16657019) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7706 + ... + 9627.

It is an arithmetic number, because the mean of its divisors is an integer number (2868777).

Almost surely, 2^16657013 is an apocalyptic number.

It is an amenable number.

16657013 is a deficient number, since it is larger than the sum of its proper divisors (555649).

16657013 is an equidigital number, since it uses as much as digits as its factorization.

16657013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17395 (or 17364 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 16657013 is about 4081.3004055080. The cubic root of 16657013 is about 255.3871499673.

The spelling of 16657013 in words is "sixteen million, six hundred fifty-seven thousand, thirteen".