7665032561 has 2 divisors, whose sum is σ = 7665032562. Its totient is φ = 7665032560.

The previous prime is 7665032521. The next prime is 7665032579. The reversal of 7665032561 is 1652305667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7617972961 + 47059600 = 87281^2 + 6860^2 .

It is a cyclic number.

It is not a de Polignac number, because 7665032561 - 2¹⁰ = 7665031537 is a prime.

It is a super-2 number, since 2×7665032561² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7665032521) 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, 3832516280 + 3832516281.

It is an arithmetic number, because the mean of its divisors is an integer number (3832516281).

Almost surely, 2^7665032561 is an apocalyptic number.

It is an amenable number.

7665032561 is a deficient number, since it is larger than the sum of its proper divisors (1).

7665032561 is an equidigital number, since it uses as much as digits as its factorization.

7665032561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 226800, while the sum is 41.

The square root of 7665032561 is about 87550.1716788722. The cubic root of 7665032561 is about 1971.6871287548.

The spelling of 7665032561 in words is "seven billion, six hundred sixty-five million, thirty-two thousand, five hundred sixty-one".