686566201 has 2 divisors, whose sum is σ = 686566202. Its totient is φ = 686566200.

The previous prime is 686566171. The next prime is 686566247. The reversal of 686566201 is 102665686.

686566201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672883600 + 13682601 = 25940^2 + 3699^2 .

It is a cyclic number.

It is not a de Polignac number, because 686566201 - 2¹⁹ = 686041913 is a prime.

It is not a weakly prime, because it can be changed into another prime (686566901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343283100 + 343283101.

It is an arithmetic number, because the mean of its divisors is an integer number (343283101).

Almost surely, 2^686566201 is an apocalyptic number.

It is an amenable number.

686566201 is a deficient number, since it is larger than the sum of its proper divisors (1).

686566201 is an equidigital number, since it uses as much as digits as its factorization.

686566201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 686566201 is about 26202.4083053448. The cubic root of 686566201 is about 882.1873105676.

The spelling of 686566201 in words is "six hundred eighty-six million, five hundred sixty-six thousand, two hundred one".