85166208139 has 2 divisors, whose sum is σ = 85166208140. Its totient is φ = 85166208138.

The previous prime is 85166208077. The next prime is 85166208161. The reversal of 85166208139 is 93180266158.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85166208139 - 2⁹ = 85166207627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85166208092 and 85166208101.

It is not a weakly prime, because it can be changed into another prime (85166208739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42583104069 + 42583104070.

It is an arithmetic number, because the mean of its divisors is an integer number (42583104070).

Almost surely, 2^85166208139 is an apocalyptic number.

85166208139 is a deficient number, since it is larger than the sum of its proper divisors (1).

85166208139 is an equidigital number, since it uses as much as digits as its factorization.

85166208139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 85166208139 in words is "eighty-five billion, one hundred sixty-six million, two hundred eight thousand, one hundred thirty-nine".