16657641614213 has 2 divisors, whose sum is σ = 16657641614214. Its totient is φ = 16657641614212.

The previous prime is 16657641614153. The next prime is 16657641614221. The reversal of 16657641614213 is 31241614675661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16653312237409 + 4329376804 = 4080847^2 + 65798^2 .

It is a cyclic number.

It is not a de Polignac number, because 16657641614213 - 2¹² = 16657641610117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16657641614113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8328820807106 + 8328820807107.

It is an arithmetic number, because the mean of its divisors is an integer number (8328820807107).

Almost surely, 2^{16657641614213} is an apocalyptic number.

It is an amenable number.

16657641614213 is a deficient number, since it is larger than the sum of its proper divisors (1).

16657641614213 is an equidigital number, since it uses as much as digits as its factorization.

16657641614213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 53.

The spelling of 16657641614213 in words is "sixteen trillion, six hundred fifty-seven billion, six hundred forty-one million, six hundred fourteen thousand, two hundred thirteen".