7966898957 has 2 divisors, whose sum is σ = 7966898958. Its totient is φ = 7966898956.

The previous prime is 7966898851. The next prime is 7966898959. The reversal of 7966898957 is 7598986697.

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., 4321879081 + 3645019876 = 65741^2 + 60374^2 .

It is a cyclic number.

It is not a de Polignac number, because 7966898957 - 2¹⁰ = 7966897933 is a prime.

Together with 7966898959, 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 (7966898959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3983449478 + 3983449479.

It is an arithmetic number, because the mean of its divisors is an integer number (3983449479).

Almost surely, 2^7966898957 is an apocalyptic number.

It is an amenable number.

7966898957 is a deficient number, since it is larger than the sum of its proper divisors (1).

7966898957 is an equidigital number, since it uses as much as digits as its factorization.

7966898957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 411505920, while the sum is 74.

The square root of 7966898957 is about 89257.4868400405. The cubic root of 7966898957 is about 1997.2377665395.

The spelling of 7966898957 in words is "seven billion, nine hundred sixty-six million, eight hundred ninety-eight thousand, nine hundred fifty-seven".