3688665 has 8 divisors (see below), whose sum is σ = 5901888. Its totient is φ = 1967280.

The previous prime is 3688661. The next prime is 3688667. The reversal of 3688665 is 5668863.

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

It is not a de Polignac number, because 3688665 - 2² = 3688661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3688661) 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, 122941 + ... + 122970.

It is an arithmetic number, because the mean of its divisors is an integer number (737736).

Almost surely, 2^3688665 is an apocalyptic number.

It is an amenable number.

3688665 is a deficient number, since it is larger than the sum of its proper divisors (2213223).

3688665 is a wasteful number, since it uses less digits than its factorization.

3688665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245919.

The product of its digits is 207360, while the sum is 42.

The square root of 3688665 is about 1920.5897531748. The cubic root of 3688665 is about 154.5099332749.

The spelling of 3688665 in words is "three million, six hundred eighty-eight thousand, six hundred sixty-five".