656663154747077 has 2 divisors, whose sum is σ = 656663154747078. Its totient is φ = 656663154747076.

The previous prime is 656663154747007. The next prime is 656663154747179. The reversal of 656663154747077 is 770747451366656.

656663154747077 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 can be written as a sum of positive squares in only one way, i.e., 333109185135841 + 323553969611236 = 18251279^2 + 17987606^2 .

It is a cyclic number.

It is not a de Polignac number, because 656663154747077 - 2⁸ = 656663154746821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 656663154746995 and 656663154747013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (656663154747007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328331577373538 + 328331577373539.

It is an arithmetic number, because the mean of its divisors is an integer number (328331577373539).

Almost surely, 2^{656663154747077} is an apocalyptic number.

It is an amenable number.

656663154747077 is a deficient number, since it is larger than the sum of its proper divisors (1).

656663154747077 is an equidigital number, since it uses as much as digits as its factorization.

656663154747077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3734035200, while the sum is 74.

The spelling of 656663154747077 in words is "six hundred fifty-six trillion, six hundred sixty-three billion, one hundred fifty-four million, seven hundred forty-seven thousand, seventy-seven".