85666564652 has 6 divisors (see below), whose sum is σ = 149916488148. Its totient is φ = 42833282324.

The previous prime is 85666564637. The next prime is 85666564657. The reversal of 85666564652 is 25646566658.

It is a super-2 number, since 2×85666564652² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 85666564591 and 85666564600.

It is not an unprimeable number, because it can be changed into a prime (85666564657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10708320578 + ... + 10708320585.

It is an arithmetic number, because the mean of its divisors is an integer number (24986081358).

Almost surely, 2^85666564652 is an apocalyptic number.

It is an amenable number.

85666564652 is a deficient number, since it is larger than the sum of its proper divisors (64249923496).

85666564652 is a wasteful number, since it uses less digits than its factorization.

85666564652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21416641167 (or 21416641165 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 59.

The spelling of 85666564652 in words is "eighty-five billion, six hundred sixty-six million, five hundred sixty-four thousand, six hundred fifty-two".