16656013 has 6 divisors (see below), whose sum is σ = 18307982. Its totient is φ = 15141720.

The previous prime is 16655993. The next prime is 16656043. The reversal of 16656013 is 31065661.

It can be written as a sum of positive squares in only one way, i.e., 13823524 + 2832489 = 3718^2 + 1683^2 .

It is not a de Polignac number, because 16656013 - 2¹³ = 16647821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16656043) 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, 68706 + ... + 68947.

Almost surely, 2^16656013 is an apocalyptic number.

It is an amenable number.

16656013 is a deficient number, since it is larger than the sum of its proper divisors (1651969).

16656013 is a wasteful number, since it uses less digits than its factorization.

16656013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137675 (or 137664 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 16656013 is about 4081.1778936969. The cubic root of 16656013 is about 255.3820391618.

The spelling of 16656013 in words is "sixteen million, six hundred fifty-six thousand, thirteen".