3711665 has 4 divisors (see below), whose sum is σ = 4454004. Its totient is φ = 2969328.

The previous prime is 3711647. The next prime is 3711679. The reversal of 3711665 is 5661173.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5661173 = 7 ⋅808739.

It can be written as a sum of positive squares in 2 ways, for example, as 2274064 + 1437601 = 1508^2 + 1199^2 .

It is a cyclic number.

It is not a de Polignac number, because 3711665 - 2¹⁶ = 3646129 is a prime.

It is a Duffinian number.

It is a Curzon 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, 371162 + ... + 371171.

It is an arithmetic number, because the mean of its divisors is an integer number (1113501).

Almost surely, 2^3711665 is an apocalyptic number.

It is an amenable number.

3711665 is a deficient number, since it is larger than the sum of its proper divisors (742339).

3711665 is an equidigital number, since it uses as much as digits as its factorization.

3711665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742338.

The product of its digits is 3780, while the sum is 29.

The square root of 3711665 is about 1926.5681924085. The cubic root of 3711665 is about 154.8304076413.

The spelling of 3711665 in words is "three million, seven hundred eleven thousand, six hundred sixty-five".