3556866 has 16 divisors (see below), whose sum is σ = 7265664. Its totient is φ = 1160304.

The previous prime is 3556853. The next prime is 3556877. The reversal of 3556866 is 6686553.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6025 + ... + 6588.

It is an arithmetic number, because the mean of its divisors is an integer number (454104).

Almost surely, 2^3556866 is an apocalyptic number.

3556866 is an abundant number, since it is smaller than the sum of its proper divisors (3708798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3556866 is a wasteful number, since it uses less digits than its factorization.

3556866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12665.

The product of its digits is 129600, while the sum is 39.

The square root of 3556866 is about 1885.9655352100. The cubic root of 3556866 is about 152.6473144258.

The spelling of 3556866 in words is "three million, five hundred fifty-six thousand, eight hundred sixty-six".