4185666 has 24 divisors (see below), whose sum is σ = 9145344. Its totient is φ = 1383480.

The previous prime is 4185661. The next prime is 4185673. The reversal of 4185666 is 6665814.

It is a self number, because there is not a number n which added to its sum of digits gives 4185666.

It is not an unprimeable number, because it can be changed into a prime (4185661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1371 + ... + 3201.

It is an arithmetic number, because the mean of its divisors is an integer number (381056).

Almost surely, 2^4185666 is an apocalyptic number.

4185666 is an abundant number, since it is smaller than the sum of its proper divisors (4959678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4185666 is a wasteful number, since it uses less digits than its factorization.

4185666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1966 (or 1963 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 4185666 is about 2045.8900263699. The cubic root of 4185666 is about 161.1591086834.

It can be divided in two parts, 4185 and 666, that added together give a triangular number (4851 = T₉₈).

The spelling of 4185666 in words is "four million, one hundred eighty-five thousand, six hundred sixty-six".