866421028283 has 2 divisors, whose sum is σ = 866421028284. Its totient is φ = 866421028282.

The previous prime is 866421028271. The next prime is 866421028303. The reversal of 866421028283 is 382820124668.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866421028283 - 2¹⁰ = 866421027259 is a prime.

It is not a weakly prime, because it can be changed into another prime (866421028223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433210514141 + 433210514142.

It is an arithmetic number, because the mean of its divisors is an integer number (433210514142).

Almost surely, 2^866421028283 is an apocalyptic number.

866421028283 is a deficient number, since it is larger than the sum of its proper divisors (1).

866421028283 is an equidigital number, since it uses as much as digits as its factorization.

866421028283 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1769472, while the sum is 50.

The spelling of 866421028283 in words is "eight hundred sixty-six billion, four hundred twenty-one million, twenty-eight thousand, two hundred eighty-three".