806711345257 has 2 divisors, whose sum is σ = 806711345258. Its totient is φ = 806711345256.

The previous prime is 806711345183. The next prime is 806711345261. The reversal of 806711345257 is 752543117608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 737487630441 + 69223714816 = 858771^2 + 263104^2 .

It is a cyclic number.

It is not a de Polignac number, because 806711345257 - 2¹¹ = 806711343209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 806711345257.

It is not a weakly prime, because it can be changed into another prime (806711345357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403355672628 + 403355672629.

It is an arithmetic number, because the mean of its divisors is an integer number (403355672629).

Almost surely, 2^806711345257 is an apocalyptic number.

It is an amenable number.

806711345257 is a deficient number, since it is larger than the sum of its proper divisors (1).

806711345257 is an equidigital number, since it uses as much as digits as its factorization.

806711345257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 806711345257 in words is "eight hundred six billion, seven hundred eleven million, three hundred forty-five thousand, two hundred fifty-seven".