3666946 has 4 divisors (see below), whose sum is σ = 5500422. Its totient is φ = 1833472.

The previous prime is 3666919. The next prime is 3666947. The reversal of 3666946 is 6496663.

3666946 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., 3515625 + 151321 = 1875^2 + 389^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3666899 and 3666908.

It is not an unprimeable number, because it can be changed into a prime (3666947) 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, 916735 + ... + 916738.

Almost surely, 2^3666946 is an apocalyptic number.

3666946 is a deficient number, since it is larger than the sum of its proper divisors (1833476).

3666946 is a wasteful number, since it uses less digits than its factorization.

3666946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833475.

The product of its digits is 139968, while the sum is 40.

The square root of 3666946 is about 1914.9271526614. The cubic root of 3666946 is about 154.2060826738.

The spelling of 3666946 in words is "three million, six hundred sixty-six thousand, nine hundred forty-six".