3657665 has 16 divisors (see below), whose sum is σ = 4859136. Its totient is φ = 2620800.

The previous prime is 3657653. The next prime is 3657677. The reversal of 3657665 is 5667563.

It is an interprime number because it is at equal distance from previous prime (3657653) and next prime (3657677).

It is not a de Polignac number, because 3657665 - 2⁴ = 3657649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3560 + ... + 4470.

It is an arithmetic number, because the mean of its divisors is an integer number (303696).

Almost surely, 2^3657665 is an apocalyptic number.

It is an amenable number.

3657665 is a deficient number, since it is larger than the sum of its proper divisors (1201471).

3657665 is a wasteful number, since it uses less digits than its factorization.

3657665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000.

The product of its digits is 113400, while the sum is 38.

The square root of 3657665 is about 1912.5022875803. The cubic root of 3657665 is about 154.0758747939.

The spelling of 3657665 in words is "three million, six hundred fifty-seven thousand, six hundred sixty-five".