85186663 has 2 divisors, whose sum is σ = 85186664. Its totient is φ = 85186662.

The previous prime is 85186627. The next prime is 85186753. The reversal of 85186663 is 36668158.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85186663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85186603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42593331 + 42593332.

It is an arithmetic number, because the mean of its divisors is an integer number (42593332).

Almost surely, 2^85186663 is an apocalyptic number.

85186663 is a deficient number, since it is larger than the sum of its proper divisors (1).

85186663 is an equidigital number, since it uses as much as digits as its factorization.

85186663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 85186663 is about 9229.6621281605. The cubic root of 85186663 is about 440.0045850073.

It can be divided in two parts, 851866 and 63, that added together give a square (851929 = 923²).

The spelling of 85186663 in words is "eighty-five million, one hundred eighty-six thousand, six hundred sixty-three".