3665863 has 8 divisors (see below), whose sum is σ = 3905280. Its totient is φ = 3429120.

The previous prime is 3665839. The next prime is 3665869. The reversal of 3665863 is 3685663.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3665863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665869) 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 7 ways as a sum of consecutive naturals, for example, 2683 + ... + 3811.

It is an arithmetic number, because the mean of its divisors is an integer number (488160).

Almost surely, 2^3665863 is an apocalyptic number.

3665863 is a deficient number, since it is larger than the sum of its proper divisors (239417).

3665863 is a wasteful number, since it uses less digits than its factorization.

3665863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337.

The product of its digits is 77760, while the sum is 37.

The square root of 3665863 is about 1914.6443533983. The cubic root of 3665863 is about 154.1909000458.

The spelling of 3665863 in words is "three million, six hundred sixty-five thousand, eight hundred sixty-three".