3666556 has 12 divisors (see below), whose sum is σ = 6623680. Its totient is φ = 1774080.

The previous prime is 3666539. The next prime is 3666581. The reversal of 3666556 is 6556663.

It is a happy number.

It is a super-2 number, since 2×3666556² = 26887265802272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14661 + ... + 14908.

Almost surely, 2^3666556 is an apocalyptic number.

It is an amenable number.

3666556 is a deficient number, since it is larger than the sum of its proper divisors (2957124).

3666556 is a wasteful number, since it uses less digits than its factorization.

3666556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29604 (or 29602 counting only the distinct ones).

The product of its digits is 97200, while the sum is 37.

The square root of 3666556 is about 1914.8253184037. The cubic root of 3666556 is about 154.2006155899.

The spelling of 3666556 in words is "three million, six hundred sixty-six thousand, five hundred fifty-six".