85166627813 has 2 divisors, whose sum is σ = 85166627814. Its totient is φ = 85166627812.

The previous prime is 85166627809. The next prime is 85166627837. The reversal of 85166627813 is 31872666158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46767090049 + 38399537764 = 216257^2 + 195958^2 .

It is a cyclic number.

It is not a de Polignac number, because 85166627813 - 2² = 85166627809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85166627893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42583313906 + 42583313907.

It is an arithmetic number, because the mean of its divisors is an integer number (42583313907).

Almost surely, 2^85166627813 is an apocalyptic number.

It is an amenable number.

85166627813 is a deficient number, since it is larger than the sum of its proper divisors (1).

85166627813 is an equidigital number, since it uses as much as digits as its factorization.

85166627813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 53.

The spelling of 85166627813 in words is "eighty-five billion, one hundred sixty-six million, six hundred twenty-seven thousand, eight hundred thirteen".