866028680201 has 2 divisors, whose sum is σ = 866028680202. Its totient is φ = 866028680200.

The previous prime is 866028680183. The next prime is 866028680227. The reversal of 866028680201 is 102086820668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 456332674576 + 409696005625 = 675524^2 + 640075^2 .

It is a cyclic number.

It is not a de Polignac number, because 866028680201 - 2⁶ = 866028680137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (866028680261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433014340100 + 433014340101.

It is an arithmetic number, because the mean of its divisors is an integer number (433014340101).

Almost surely, 2^866028680201 is an apocalyptic number.

It is an amenable number.

866028680201 is a deficient number, since it is larger than the sum of its proper divisors (1).

866028680201 is an equidigital number, since it uses as much as digits as its factorization.

866028680201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 866028680201 in words is "eight hundred sixty-six billion, twenty-eight million, six hundred eighty thousand, two hundred one".