7661261759 has 2 divisors, whose sum is σ = 7661261760. Its totient is φ = 7661261758.

The previous prime is 7661261747. The next prime is 7661261809. The reversal of 7661261759 is 9571621667.

7661261759 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (7661261809) can be obtained adding 7661261759 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7661261759 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7661261359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3830630879 + 3830630880.

It is an arithmetic number, because the mean of its divisors is an integer number (3830630880).

Almost surely, 2^7661261759 is an apocalyptic number.

7661261759 is a deficient number, since it is larger than the sum of its proper divisors (1).

7661261759 is an equidigital number, since it uses as much as digits as its factorization.

7661261759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 50.

The square root of 7661261759 is about 87528.6339377006. The cubic root of 7661261759 is about 1971.3637528165.

The spelling of 7661261759 in words is "seven billion, six hundred sixty-one million, two hundred sixty-one thousand, seven hundred fifty-nine".