8666685 has 24 divisors (see below), whose sum is σ = 15907320. Its totient is φ = 4349952.

The previous prime is 8666683. The next prime is 8666711. The reversal of 8666685 is 5866668.

8666685 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1279161 + 7387524 = 1131^2 + 2718^2 .

It is not a de Polignac number, because 8666685 - 2¹ = 8666683 is a prime.

It is a super-2 number, since 2×8666685² = 150222857778450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 8666685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8666681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4900 + ... + 6429.

It is an arithmetic number, because the mean of its divisors is an integer number (662805).

Almost surely, 2^8666685 is an apocalyptic number.

8666685 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8666685 is a deficient number, since it is larger than the sum of its proper divisors (7240635).

8666685 is a wasteful number, since it uses less digits than its factorization.

8666685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11357 (or 11354 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 8666685 is about 2943.9234025361. The cubic root of 8666685 is about 205.4081497638.

The spelling of 8666685 in words is "eight million, six hundred sixty-six thousand, six hundred eighty-five".