3666685 has 16 divisors (see below), whose sum is σ = 4841280. Its totient is φ = 2643840.

The previous prime is 3666661. The next prime is 3666703. The reversal of 3666685 is 5866663.

It is not a de Polignac number, because 3666685 - 2¹³ = 3658493 is a prime.

It is a super-3 number, since 3×3666685³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8761 + ... + 9169.

It is an arithmetic number, because the mean of its divisors is an integer number (302580).

Almost surely, 2^3666685 is an apocalyptic number.

It is an amenable number.

3666685 is a deficient number, since it is larger than the sum of its proper divisors (1174595).

3666685 is a wasteful number, since it uses less digits than its factorization.

3666685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588.

The product of its digits is 155520, while the sum is 40.

The square root of 3666685 is about 1914.8590026422. The cubic root of 3666685 is about 154.2024239759.

The spelling of 3666685 in words is "three million, six hundred sixty-six thousand, six hundred eighty-five".