3666945 has 8 divisors (see below), whose sum is σ = 5867136. Its totient is φ = 1955696.

The previous prime is 3666919. The next prime is 3666947. The reversal of 3666945 is 5496663.

It is a happy number.

3666945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3666945 - 2⁶ = 3666881 is a prime.

It is a d-powerful number, because it can be written as 3⁷ + 6⁵ + 6⁵ + 6⁸ + 9² + 4⁷ + 5⁹ .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3666947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122217 + ... + 122246.

It is an arithmetic number, because the mean of its divisors is an integer number (733392).

Almost surely, 2^3666945 is an apocalyptic number.

It is an amenable number.

3666945 is a deficient number, since it is larger than the sum of its proper divisors (2200191).

3666945 is a wasteful number, since it uses less digits than its factorization.

3666945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244471.

The product of its digits is 116640, while the sum is 39.

The square root of 3666945 is about 1914.9268915549. The cubic root of 3666945 is about 154.2060686561.

The spelling of 3666945 in words is "three million, six hundred sixty-six thousand, nine hundred forty-five".