3660666 has 16 divisors (see below), whose sum is σ = 7557888. Its totient is φ = 1180800.

The previous prime is 3660653. The next prime is 3660667. The reversal of 3660666 is 6660663.

It is not an unprimeable number, because it can be changed into a prime (3660667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9655 + ... + 10026.

It is an arithmetic number, because the mean of its divisors is an integer number (472368).

Almost surely, 2^3660666 is an apocalyptic number.

3660666 is an abundant number, since it is smaller than the sum of its proper divisors (3897222).

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

3660666 is a wasteful number, since it uses less digits than its factorization.

3660666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19717.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 3660666 is about 1913.2867009416. The cubic root of 3660666 is about 154.1180014240.

The spelling of 3660666 in words is "three million, six hundred sixty thousand, six hundred sixty-six".