3706665 has 16 divisors (see below), whose sum is σ = 6029376. Its totient is φ = 1944000.

The previous prime is 3706649. The next prime is 3706669. The reversal of 3706665 is 5666073.

3706665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3706665 - 2⁴ = 3706649 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3706669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1111 + ... + 2940.

It is an arithmetic number, because the mean of its divisors is an integer number (376836).

Almost surely, 2^3706665 is an apocalyptic number.

It is an amenable number.

3706665 is a deficient number, since it is larger than the sum of its proper divisors (2322711).

3706665 is a wasteful number, since it uses less digits than its factorization.

3706665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 3706665 is about 1925.2701109195. The cubic root of 3706665 is about 154.7608521615.

It can be divided in two parts, 3706 and 665, that added together give a triangular number (4371 = T₉₃).

The spelling of 3706665 in words is "three million, seven hundred six thousand, six hundred sixty-five".