656706091 has 2 divisors, whose sum is σ = 656706092. Its totient is φ = 656706090.

The previous prime is 656706079. The next prime is 656706103. The reversal of 656706091 is 190607656.

It is a balanced prime because it is at equal distance from previous prime (656706079) and next prime (656706103).

It is a cyclic number.

It is not a de Polignac number, because 656706091 - 2⁵ = 656706059 is a prime.

It is not a weakly prime, because it can be changed into another prime (656706041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328353045 + 328353046.

It is an arithmetic number, because the mean of its divisors is an integer number (328353046).

Almost surely, 2^656706091 is an apocalyptic number.

656706091 is a deficient number, since it is larger than the sum of its proper divisors (1).

656706091 is an equidigital number, since it uses as much as digits as its factorization.

656706091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 656706091 is about 25626.2773535291. The cubic root of 656706091 is about 869.2079332637.

The spelling of 656706091 in words is "six hundred fifty-six million, seven hundred six thousand, ninety-one".