7995555977 has 2 divisors, whose sum is σ = 7995555978. Its totient is φ = 7995555976.

The previous prime is 7995555961. The next prime is 7995555989. The reversal of 7995555977 is 7795555997.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7989499456 + 6056521 = 89384^2 + 2461^2 .

It is a cyclic number.

It is not a de Polignac number, because 7995555977 - 2⁴ = 7995555961 is a prime.

It is not a weakly prime, because it can be changed into another prime (7995555077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3997777988 + 3997777989.

It is an arithmetic number, because the mean of its divisors is an integer number (3997777989).

Almost surely, 2^7995555977 is an apocalyptic number.

It is an amenable number.

7995555977 is a deficient number, since it is larger than the sum of its proper divisors (1).

7995555977 is an equidigital number, since it uses as much as digits as its factorization.

7995555977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156279375, while the sum is 68.

The square root of 7995555977 is about 89417.8728051613. The cubic root of 7995555977 is about 1999.6295961547.

The spelling of 7995555977 in words is "seven billion, nine hundred ninety-five million, five hundred fifty-five thousand, nine hundred seventy-seven".