7357765661 has 2 divisors, whose sum is σ = 7357765662. Its totient is φ = 7357765660.

The previous prime is 7357765579. The next prime is 7357765663. The reversal of 7357765661 is 1665677537.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6696967225 + 660798436 = 81835^2 + 25706^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7357765661 is a prime.

Together with 7357765663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7357765663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3678882830 + 3678882831.

It is an arithmetic number, because the mean of its divisors is an integer number (3678882831).

Almost surely, 2^7357765661 is an apocalyptic number.

It is an amenable number.

7357765661 is a deficient number, since it is larger than the sum of its proper divisors (1).

7357765661 is an equidigital number, since it uses as much as digits as its factorization.

7357765661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5556600, while the sum is 53.

The square root of 7357765661 is about 85777.4192955232. The cubic root of 7357765661 is about 1944.9807943685.

The spelling of 7357765661 in words is "seven billion, three hundred fifty-seven million, seven hundred sixty-five thousand, six hundred sixty-one".