3866563 has 4 divisors (see below), whose sum is σ = 3894520. Its totient is φ = 3838608.

The previous prime is 3866543. The next prime is 3866581. The reversal of 3866563 is 3656683.

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-3866563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3866543) 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, 13770 + ... + 14047.

It is an arithmetic number, because the mean of its divisors is an integer number (973630).

Almost surely, 2^3866563 is an apocalyptic number.

3866563 is a deficient number, since it is larger than the sum of its proper divisors (27957).

3866563 is a wasteful number, since it uses less digits than its factorization.

3866563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27956.

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

The square root of 3866563 is about 1966.3578006050. The cubic root of 3866563 is about 156.9549548244.

The spelling of 3866563 in words is "three million, eight hundred sixty-six thousand, five hundred sixty-three".