3847666 has 4 divisors (see below), whose sum is σ = 5771502. Its totient is φ = 1923832.

The previous prime is 3847663. The next prime is 3847673. The reversal of 3847666 is 6667483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6667483 = 61 ⋅109303.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 1901641 = 1395^2 + 1379^2 .

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (3847663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 961915 + ... + 961918.

Almost surely, 2^3847666 is an apocalyptic number.

3847666 is a deficient number, since it is larger than the sum of its proper divisors (1923836).

3847666 is a wasteful number, since it uses less digits than its factorization.

3847666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923835.

The product of its digits is 145152, while the sum is 40.

The square root of 3847666 is about 1961.5468385945. The cubic root of 3847666 is about 156.6988425438.

The spelling of 3847666 in words is "three million, eight hundred forty-seven thousand, six hundred sixty-six".