3666866 has 48 divisors (see below), whose sum is σ = 7091712. Its totient is φ = 1411200.

The previous prime is 3666853. The next prime is 3666877. The reversal of 3666866 is 6686663.

Its product of digits (186624) is a multiple of the sum of its prime divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51611 + ... + 51681.

It is an arithmetic number, because the mean of its divisors is an integer number (147744).

Almost surely, 2^3666866 is an apocalyptic number.

3666866 is a deficient number, since it is larger than the sum of its proper divisors (3424846).

3666866 is a wasteful number, since it uses less digits than its factorization.

3666866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 128 counting only the distinct ones).

The product of its digits is 186624, while the sum is 41.

The square root of 3666866 is about 1914.9062640244. The cubic root of 3666866 is about 154.2049612523.

The spelling of 3666866 in words is "three million, six hundred sixty-six thousand, eight hundred sixty-six".