3661165 has 4 divisors (see below), whose sum is σ = 4393404. Its totient is φ = 2928928.

The previous prime is 3661157. The next prime is 3661181. The reversal of 3661165 is 5611663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2683044 + 978121 = 1638^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 3661165 - 2³ = 3661157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 366112 + ... + 366121.

It is an arithmetic number, because the mean of its divisors is an integer number (1098351).

Almost surely, 2^3661165 is an apocalyptic number.

It is an amenable number.

3661165 is a deficient number, since it is larger than the sum of its proper divisors (732239).

3661165 is an equidigital number, since it uses as much as digits as its factorization.

3661165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732238.

The product of its digits is 3240, while the sum is 28.

The square root of 3661165 is about 1913.4171003730. The cubic root of 3661165 is about 154.1250039192.

The spelling of 3661165 in words is "three million, six hundred sixty-one thousand, one hundred sixty-five".