3665690 has 24 divisors (see below), whose sum is σ = 7676532. Its totient is φ = 1256640.

The previous prime is 3665677. The next prime is 3665731. The reversal of 3665690 is 965663.

It can be written as a sum of positive squares in 2 ways, for example, as 3598609 + 67081 = 1897^2 + 259^2 .

It is a super-4 number, since 4×3665690⁴ (a number of 27 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3665690.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3251 + ... + 4230.

Almost surely, 2^3665690 is an apocalyptic number.

3665690 is an abundant number, since it is smaller than the sum of its proper divisors (4010842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3665690 is a wasteful number, since it uses less digits than its factorization.

3665690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7502 (or 7495 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 3665690 is about 1914.5991747622. The cubic root of 3665690 is about 154.1884744736.

The spelling of 3665690 in words is "three million, six hundred sixty-five thousand, six hundred ninety".