3666845 has 16 divisors (see below), whose sum is σ = 5416320. Its totient is φ = 2320704.

The previous prime is 3666841. The next prime is 3666853. The reversal of 3666845 is 5486663.

It is a cyclic number.

It is not a de Polignac number, because 3666845 - 2² = 3666841 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 3666799 and 3666808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3575 + ... + 4484.

It is an arithmetic number, because the mean of its divisors is an integer number (338520).

Almost surely, 2^3666845 is an apocalyptic number.

3666845 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3666845 is a deficient number, since it is larger than the sum of its proper divisors (1749475).

3666845 is a wasteful number, since it uses less digits than its factorization.

3666845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8084.

The product of its digits is 103680, while the sum is 38.

The square root of 3666845 is about 1914.9007807195. The cubic root of 3666845 is about 154.2046668765.

The spelling of 3666845 in words is "three million, six hundred sixty-six thousand, eight hundred forty-five".