866020667 has 2 divisors, whose sum is σ = 866020668. Its totient is φ = 866020666.

The previous prime is 866020621. The next prime is 866020669. The reversal of 866020667 is 766020668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866020667 - 2¹⁰ = 866019643 is a prime.

It is a super-2 number, since 2×866020667² = 1499983591342249778, which contains 22 as substring.

Together with 866020669, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (866020669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433010333 + 433010334.

It is an arithmetic number, because the mean of its divisors is an integer number (433010334).

Almost surely, 2^866020667 is an apocalyptic number.

866020667 is a deficient number, since it is larger than the sum of its proper divisors (1).

866020667 is an equidigital number, since it uses as much as digits as its factorization.

866020667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 866020667 is about 29428.2290836537. The cubic root of 866020667 is about 953.1825551585.

Subtracting from 866020667 its reverse (766020668), we obtain a palindrome (99999999).

The spelling of 866020667 in words is "eight hundred sixty-six million, twenty thousand, six hundred sixty-seven".