3660391 has 8 divisors (see below), whose sum is σ = 4212224. Its totient is φ = 3115800.

The previous prime is 3660379. The next prime is 3660401. The reversal of 3660391 is 1930663.

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 3660391 - 2⁵ = 3660359 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3660191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675 + ... + 2788.

It is an arithmetic number, because the mean of its divisors is an integer number (526528).

Almost surely, 2^3660391 is an apocalyptic number.

3660391 is a deficient number, since it is larger than the sum of its proper divisors (551833).

3660391 is a wasteful number, since it uses less digits than its factorization.

3660391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3621.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 3660391 is about 1913.2148337288. The cubic root of 3660391 is about 154.1141420614.

The spelling of 3660391 in words is "three million, six hundred sixty thousand, three hundred ninety-one".