3858666 has 16 divisors (see below), whose sum is σ = 8819904. Its totient is φ = 1102464.

The previous prime is 3858629. The next prime is 3858667. The reversal of 3858666 is 6668583.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 91873 = 3858666 / (3 + 8 + 5 + 8 + 6 + 6 + 6).

It is not an unprimeable number, because it can be changed into a prime (3858667) 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, 45895 + ... + 45978.

It is an arithmetic number, because the mean of its divisors is an integer number (551244).

Almost surely, 2^3858666 is an apocalyptic number.

3858666 is an abundant number, since it is smaller than the sum of its proper divisors (4961238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3858666 is a wasteful number, since it uses less digits than its factorization.

3858666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91885.

The product of its digits is 207360, while the sum is 42.

The square root of 3858666 is about 1964.3487470406. The cubic root of 3858666 is about 156.8480279867.

The spelling of 3858666 in words is "three million, eight hundred fifty-eight thousand, six hundred sixty-six".