3666646 has 8 divisors (see below), whose sum is σ = 5603904. Its totient is φ = 1798680.

The previous prime is 3666629. The next prime is 3666647. The reversal of 3666646 is 6466663.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3666647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17190 + ... + 17401.

It is an arithmetic number, because the mean of its divisors is an integer number (700488).

Almost surely, 2^3666646 is an apocalyptic number.

3666646 is a deficient number, since it is larger than the sum of its proper divisors (1937258).

3666646 is a wasteful number, since it uses less digits than its factorization.

3666646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34646.

The product of its digits is 93312, while the sum is 37.

The square root of 3666646 is about 1914.8488190977. The cubic root of 3666646 is about 154.2018772591.

The spelling of 3666646 in words is "three million, six hundred sixty-six thousand, six hundred forty-six".