7966820171 has 2 divisors, whose sum is σ = 7966820172. Its totient is φ = 7966820170.

The previous prime is 7966820123. The next prime is 7966820273. The reversal of 7966820171 is 1710286697.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7966820171 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (7966820371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3983410085 + 3983410086.

It is an arithmetic number, because the mean of its divisors is an integer number (3983410086).

Almost surely, 2^7966820171 is an apocalyptic number.

7966820171 is a deficient number, since it is larger than the sum of its proper divisors (1).

7966820171 is an equidigital number, since it uses as much as digits as its factorization.

7966820171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 7966820171 is about 89257.0454978205. The cubic root of 7966820171 is about 1997.2311828447.

The spelling of 7966820171 in words is "seven billion, nine hundred sixty-six million, eight hundred twenty thousand, one hundred seventy-one".