3665659 has 8 divisors (see below), whose sum is σ = 3937248. Its totient is φ = 3400320.

The previous prime is 3665653. The next prime is 3665677. The reversal of 3665659 is 9565663.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3665659 - 2⁹ = 3665147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3665653) 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, 312 + ... + 2725.

It is an arithmetic number, because the mean of its divisors is an integer number (492156).

Almost surely, 2^3665659 is an apocalyptic number.

3665659 is a deficient number, since it is larger than the sum of its proper divisors (271589).

3665659 is a wasteful number, since it uses less digits than its factorization.

3665659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125.

The product of its digits is 145800, while the sum is 40.

The square root of 3665659 is about 1914.5910790558. The cubic root of 3665659 is about 154.1880398255.

The spelling of 3665659 in words is "three million, six hundred sixty-five thousand, six hundred fifty-nine".