3657666 has 16 divisors (see below), whose sum is σ = 7485984. Its totient is φ = 1190784.

The previous prime is 3657653. The next prime is 3657677. The reversal of 3657666 is 6667563.

It is a Curzon number.

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, 6831 + ... + 7346.

It is an arithmetic number, because the mean of its divisors is an integer number (467874).

Almost surely, 2^3657666 is an apocalyptic number.

3657666 is an abundant number, since it is smaller than the sum of its proper divisors (3828318).

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

3657666 is a wasteful number, since it uses less digits than its factorization.

3657666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14225.

The product of its digits is 136080, while the sum is 39.

The square root of 3657666 is about 1912.5025490179. The cubic root of 3657666 is about 154.0758888353.

The spelling of 3657666 in words is "three million, six hundred fifty-seven thousand, six hundred sixty-six".