3866566 has 8 divisors (see below), whose sum is σ = 6327144. Its totient is φ = 1757520.

The previous prime is 3866543. The next prime is 3866581. The reversal of 3866566 is 6656683.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87855 + ... + 87898.

It is an arithmetic number, because the mean of its divisors is an integer number (790893).

Almost surely, 2^3866566 is an apocalyptic number.

3866566 is a deficient number, since it is larger than the sum of its proper divisors (2460578).

3866566 is a wasteful number, since it uses less digits than its factorization.

3866566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175766.

The product of its digits is 155520, while the sum is 40.

The square root of 3866566 is about 1966.3585634365. The cubic root of 3866566 is about 156.9549954173.

The spelling of 3866566 in words is "three million, eight hundred sixty-six thousand, five hundred sixty-six".