16678201 has 2 divisors, whose sum is σ = 16678202. Its totient is φ = 16678200.

The previous prime is 16678187. The next prime is 16678213. The reversal of 16678201 is 10287661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9517225 + 7160976 = 3085^2 + 2676^2 .

It is an emirp because it is prime and its reverse (10287661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16678201 - 2⁵ = 16678169 is a prime.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 16678201 parts by 5775 straight cuts.

It is not a weakly prime, because it can be changed into another prime (16678271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8339100 + 8339101.

It is an arithmetic number, because the mean of its divisors is an integer number (8339101).

Almost surely, 2^16678201 is an apocalyptic number.

It is an amenable number.

16678201 is a deficient number, since it is larger than the sum of its proper divisors (1).

16678201 is an equidigital number, since it uses as much as digits as its factorization.

16678201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 16678201 is about 4083.8953218710. The cubic root of 16678201 is about 255.4953896659.

The spelling of 16678201 in words is "sixteen million, six hundred seventy-eight thousand, two hundred one".