3665651 has 8 divisors (see below), whose sum is σ = 4209600. Its totient is φ = 3156840.

The previous prime is 3665633. The next prime is 3665653. The reversal of 3665651 is 1565663.

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 3665651 - 2⁶ = 3665587 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8561 + ... + 8978.

It is an arithmetic number, because the mean of its divisors is an integer number (526200).

Almost surely, 2^3665651 is an apocalyptic number.

3665651 is a deficient number, since it is larger than the sum of its proper divisors (543949).

3665651 is a wasteful number, since it uses less digits than its factorization.

3665651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17569.

The product of its digits is 16200, while the sum is 32.

The square root of 3665651 is about 1914.5889898357. The cubic root of 3665651 is about 154.1879276578.

The spelling of 3665651 in words is "three million, six hundred sixty-five thousand, six hundred fifty-one".