3666547 has 4 divisors (see below), whose sum is σ = 3684136. Its totient is φ = 3648960.

The previous prime is 3666539. The next prime is 3666581. The reversal of 3666547 is 7456663.

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

It is a cyclic number.

It is not a de Polignac number, because 3666547 - 2³ = 3666539 is a prime.

It is a Duffinian number.

3666547 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3666347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8478 + ... + 8899.

It is an arithmetic number, because the mean of its divisors is an integer number (921034).

Almost surely, 2^3666547 is an apocalyptic number.

3666547 is a deficient number, since it is larger than the sum of its proper divisors (17589).

3666547 is a wasteful number, since it uses less digits than its factorization.

3666547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17588.

The product of its digits is 90720, while the sum is 37.

The square root of 3666547 is about 1914.8229683185. The cubic root of 3666547 is about 154.2004894218.

The spelling of 3666547 in words is "three million, six hundred sixty-six thousand, five hundred forty-seven".