7706140661 has 2 divisors, whose sum is σ = 7706140662. Its totient is φ = 7706140660.

The previous prime is 7706140643. The next prime is 7706140709. The reversal of 7706140661 is 1660416077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5952122500 + 1754018161 = 77150^2 + 41881^2 .

It is a cyclic number.

It is not a de Polignac number, because 7706140661 - 2²⁶ = 7639031797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7706140261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3853070330 + 3853070331.

It is an arithmetic number, because the mean of its divisors is an integer number (3853070331).

Almost surely, 2^7706140661 is an apocalyptic number.

It is an amenable number.

7706140661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7706140661 is an equidigital number, since it uses as much as digits as its factorization.

7706140661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 7706140661 is about 87784.6265641086. The cubic root of 7706140661 is about 1975.2056111099.

The spelling of 7706140661 in words is "seven billion, seven hundred six million, one hundred forty thousand, six hundred sixty-one".