7965775957 has 2 divisors, whose sum is σ = 7965775958. Its totient is φ = 7965775956.

The previous prime is 7965775921. The next prime is 7965776051. The reversal of 7965775957 is 7595775697.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7844467761 + 121308196 = 88569^2 + 11014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7965775957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7965775892 and 7965775901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7965775057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3982887978 + 3982887979.

It is an arithmetic number, because the mean of its divisors is an integer number (3982887979).

Almost surely, 2^7965775957 is an apocalyptic number.

It is an amenable number.

7965775957 is a deficient number, since it is larger than the sum of its proper divisors (1).

7965775957 is an equidigital number, since it uses as much as digits as its factorization.

7965775957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145860750, while the sum is 67.

The square root of 7965775957 is about 89251.1958295238. The cubic root of 7965775957 is about 1997.1439197610.

The spelling of 7965775957 in words is "seven billion, nine hundred sixty-five million, seven hundred seventy-five thousand, nine hundred fifty-seven".