85663647 has 12 divisors (see below), whose sum is σ = 130249080. Its totient is φ = 54103248.

The previous prime is 85663639. The next prime is 85663667. The reversal of 85663647 is 74636658.

85663647 is a `hidden beast` number, since 8 + 5 + 6 + 636 + 4 + 7 = 666.

It is not a de Polignac number, because 85663647 - 2³ = 85663639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85663607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250308 + ... + 250649.

It is an arithmetic number, because the mean of its divisors is an integer number (10854090).

Almost surely, 2^85663647 is an apocalyptic number.

85663647 is a deficient number, since it is larger than the sum of its proper divisors (44585433).

85663647 is a wasteful number, since it uses less digits than its factorization.

85663647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500982 (or 500979 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 85663647 is about 9255.4657905478. The cubic root of 85663647 is about 440.8242933083.

The spelling of 85663647 in words is "eighty-five million, six hundred sixty-three thousand, six hundred forty-seven".