866717995243 has 2 divisors, whose sum is σ = 866717995244. Its totient is φ = 866717995242.

The previous prime is 866717995201. The next prime is 866717995303. The reversal of 866717995243 is 342599717668.

866717995243 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866717995243 is a prime.

It is not a weakly prime, because it can be changed into another prime (866717995043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433358997621 + 433358997622.

It is an arithmetic number, because the mean of its divisors is an integer number (433358997622).

Almost surely, 2^866717995243 is an apocalyptic number.

866717995243 is a deficient number, since it is larger than the sum of its proper divisors (1).

866717995243 is an equidigital number, since it uses as much as digits as its factorization.

866717995243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137168640, while the sum is 67.

The spelling of 866717995243 in words is "eight hundred sixty-six billion, seven hundred seventeen million, nine hundred ninety-five thousand, two hundred forty-three".