7706561 has 2 divisors, whose sum is σ = 7706562. Its totient is φ = 7706560.

The previous prime is 7706551. The next prime is 7706579. The reversal of 7706561 is 1656077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7392961 + 313600 = 2719^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 7706561 - 2⁶ = 7706497 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7706551) 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, 3853280 + 3853281.

It is an arithmetic number, because the mean of its divisors is an integer number (3853281).

Almost surely, 2^7706561 is an apocalyptic number.

It is an amenable number.

7706561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7706561 is an equidigital number, since it uses as much as digits as its factorization.

7706561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 7706561 is about 2776.0693435143. The cubic root of 7706561 is about 197.5241523633.

The spelling of 7706561 in words is "seven million, seven hundred six thousand, five hundred sixty-one".