3966818 has 4 divisors (see below), whose sum is σ = 5950230. Its totient is φ = 1983408.

The previous prime is 3966817. The next prime is 3966857. The reversal of 3966818 is 8186693.

It is a happy number.

3966818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2411809 + 1555009 = 1553^2 + 1247^2 .

It is not an unprimeable number, because it can be changed into a prime (3966817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991703 + ... + 991706.

Almost surely, 2^3966818 is an apocalyptic number.

3966818 is a deficient number, since it is larger than the sum of its proper divisors (1983412).

3966818 is a wasteful number, since it uses less digits than its factorization.

3966818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983411.

The product of its digits is 62208, while the sum is 41.

The square root of 3966818 is about 1991.6872244406. The cubic root of 3966818 is about 158.2999429743.

The spelling of 3966818 in words is "three million, nine hundred sixty-six thousand, eight hundred eighteen".