866201971 has 2 divisors, whose sum is σ = 866201972. Its totient is φ = 866201970.

The previous prime is 866201953. The next prime is 866202017. The reversal of 866201971 is 179102668.

866201971 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 not a de Polignac number, because 866201971 - 2⁵ = 866201939 is a prime.

It is not a weakly prime, because it can be changed into another prime (866201911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433100985 + 433100986.

It is an arithmetic number, because the mean of its divisors is an integer number (433100986).

Almost surely, 2^866201971 is an apocalyptic number.

866201971 is a deficient number, since it is larger than the sum of its proper divisors (1).

866201971 is an equidigital number, since it uses as much as digits as its factorization.

866201971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 866201971 is about 29431.3093660476. The cubic root of 866201971 is about 953.2490677173.

The spelling of 866201971 in words is "eight hundred sixty-six million, two hundred one thousand, nine hundred seventy-one".