3665560 has 16 divisors (see below), whose sum is σ = 8247600. Its totient is φ = 1466208.

The previous prime is 3665539. The next prime is 3665573. The reversal of 3665560 is 655663.

It is a happy number.

It is a super-2 number, since 2×3665560² = 26872660227200, which contains 22 as substring.

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, 45780 + ... + 45859.

It is an arithmetic number, because the mean of its divisors is an integer number (515475).

Almost surely, 2^3665560 is an apocalyptic number.

It is an amenable number.

3665560 is an abundant number, since it is smaller than the sum of its proper divisors (4582040).

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

3665560 is a wasteful number, since it uses less digits than its factorization.

3665560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91650 (or 91646 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 3665560 is about 1914.5652247965. The cubic root of 3665560 is about 154.1866517392.

It can be divided in two parts, 3665 and 560, that added together give a square (4225 = 65²).

The spelling of 3665560 in words is "three million, six hundred sixty-five thousand, five hundred sixty".