4166685 has 12 divisors (see below), whose sum is σ = 7222332. Its totient is φ = 2222208.

The previous prime is 4166671. The next prime is 4166689. The reversal of 4166685 is 5866614.

It can be written as a sum of positive squares in 2 ways, for example, as 3006756 + 1159929 = 1734^2 + 1077^2 .

It is not a de Polignac number, because 4166685 - 2⁷ = 4166557 is a prime.

It is a super-2 number, since 2×4166685² = 34722527778450, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4166689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46252 + ... + 46341.

It is an arithmetic number, because the mean of its divisors is an integer number (601861).

Almost surely, 2^4166685 is an apocalyptic number.

4166685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4166685 is a deficient number, since it is larger than the sum of its proper divisors (3055647).

4166685 is a wasteful number, since it uses less digits than its factorization.

4166685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92604 (or 92601 counting only the distinct ones).

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

The square root of 4166685 is about 2041.2459430456. The cubic root of 4166685 is about 160.9151334424.

It can be divided in two parts, 4166 and 685, that added together give a triangular number (4851 = T₉₈).

The spelling of 4166685 in words is "four million, one hundred sixty-six thousand, six hundred eighty-five".