706668091 has 2 divisors, whose sum is σ = 706668092. Its totient is φ = 706668090.

The previous prime is 706668089. The next prime is 706668101. The reversal of 706668091 is 190866607.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 706668091 - 2¹ = 706668089 is a prime.

Together with 706668089, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (706668191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353334045 + 353334046.

It is an arithmetic number, because the mean of its divisors is an integer number (353334046).

Almost surely, 2^706668091 is an apocalyptic number.

706668091 is a deficient number, since it is larger than the sum of its proper divisors (1).

706668091 is an equidigital number, since it uses as much as digits as its factorization.

706668091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 706668091 is about 26583.2295065893. The cubic root of 706668091 is about 890.7144416931.

It can be divided in two parts, 7066 and 68091, that added together give a palindrome (75157).

The spelling of 706668091 in words is "seven hundred six million, six hundred sixty-eight thousand, ninety-one".