3665775 has 24 divisors (see below), whose sum is σ = 6229264. Its totient is φ = 1900800.

The previous prime is 3665759. The next prime is 3665777. The reversal of 3665775 is 5775663.

It is not a de Polignac number, because 3665775 - 2⁴ = 3665759 is a prime.

It is a d-powerful number, because it can be written as 3⁹ + 6⁵ + 6⁸ + 5⁵ + 7² + 7⁴ + 5⁹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665777) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2115 + ... + 3435.

Almost surely, 2^3665775 is an apocalyptic number.

3665775 is a deficient number, since it is larger than the sum of its proper divisors (2563489).

3665775 is a wasteful number, since it uses less digits than its factorization.

3665775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1371 (or 1366 counting only the distinct ones).

The product of its digits is 132300, while the sum is 39.

The square root of 3665775 is about 1914.6213724912. The cubic root of 3665775 is about 154.1896662383.

The spelling of 3665775 in words is "three million, six hundred sixty-five thousand, seven hundred seventy-five".