16651413 has 20 divisors (see below), whose sum is σ = 25006828. Its totient is φ = 11041920.

The previous prime is 16651409. The next prime is 16651421. The reversal of 16651413 is 31415661.

16651413 is a `hidden beast` number, since 1 + 6 + 651 + 4 + 1 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6036849 + 10614564 = 2457^2 + 3258^2 .

It is not a de Polignac number, because 16651413 - 2² = 16651409 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16651463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19095 + ... + 19947.

Almost surely, 2^16651413 is an apocalyptic number.

It is an amenable number.

16651413 is a deficient number, since it is larger than the sum of its proper divisors (8355415).

16651413 is an equidigital number, since it uses as much as digits as its factorization.

16651413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1097 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 16651413 is about 4080.6142919909. The cubic root of 16651413 is about 255.3585268214.

The spelling of 16651413 in words is "sixteen million, six hundred fifty-one thousand, four hundred thirteen".