3665567 has 4 divisors (see below), whose sum is σ = 3669456. Its totient is φ = 3661680.

The previous prime is 3665539. The next prime is 3665573. The reversal of 3665567 is 7655663.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7655663 = 59 ⋅129757.

It is a cyclic number.

It is not a de Polignac number, because 3665567 - 2¹⁸ = 3403423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3665567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665507) 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 3 ways as a sum of consecutive naturals, for example, 467 + ... + 2747.

It is an arithmetic number, because the mean of its divisors is an integer number (917364).

Almost surely, 2^3665567 is an apocalyptic number.

3665567 is a deficient number, since it is larger than the sum of its proper divisors (3889).

3665567 is a wasteful number, since it uses less digits than its factorization.

3665567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888.

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

The square root of 3665567 is about 1914.5670528869. The cubic root of 3665567 is about 154.1867498875.

The spelling of 3665567 in words is "three million, six hundred sixty-five thousand, five hundred sixty-seven".