866727971 has 2 divisors, whose sum is σ = 866727972. Its totient is φ = 866727970.

The previous prime is 866727931. The next prime is 866727991. The reversal of 866727971 is 179727668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866727971 - 2²² = 862533667 is a prime.

It is a super-3 number, since 3×866727971³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (866727931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433363985 + 433363986.

It is an arithmetic number, because the mean of its divisors is an integer number (433363986).

Almost surely, 2^866727971 is an apocalyptic number.

866727971 is a deficient number, since it is larger than the sum of its proper divisors (1).

866727971 is an equidigital number, since it uses as much as digits as its factorization.

866727971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 53.

The square root of 866727971 is about 29440.2440716785. The cubic root of 866727971 is about 953.4419817517.

The spelling of 866727971 in words is "eight hundred sixty-six million, seven hundred twenty-seven thousand, nine hundred seventy-one".