3666671 has 4 divisors (see below), whose sum is σ = 3756144. Its totient is φ = 3577200.

The previous prime is 3666661. The next prime is 3666703. The reversal of 3666671 is 1766663.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3666671 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666661) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 44675 + ... + 44756.

It is an arithmetic number, because the mean of its divisors is an integer number (939036).

Almost surely, 2^3666671 is an apocalyptic number.

3666671 is a deficient number, since it is larger than the sum of its proper divisors (89473).

3666671 is an equidigital number, since it uses as much as digits as its factorization.

3666671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89472.

The product of its digits is 27216, while the sum is 35.

The square root of 3666671 is about 1914.8553470171. The cubic root of 3666671 is about 154.2022277190.

The spelling of 3666671 in words is "three million, six hundred sixty-six thousand, six hundred seventy-one".