3665607 has 16 divisors (see below), whose sum is σ = 5384448. Its totient is φ = 2199680.

The previous prime is 3665587. The next prime is 3665609. The reversal of 3665607 is 7065663.

It is a cyclic number.

It is not a de Polignac number, because 3665607 - 2¹¹ = 3663559 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3665609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3238 + ... + 4220.

It is an arithmetic number, because the mean of its divisors is an integer number (336528).

Almost surely, 2^3665607 is an apocalyptic number.

3665607 is a deficient number, since it is larger than the sum of its proper divisors (1718841).

3665607 is a wasteful number, since it uses less digits than its factorization.

3665607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110.

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

The square root of 3665607 is about 1914.5774990843. The cubic root of 3665607 is about 154.1873107328.

The spelling of 3665607 in words is "three million, six hundred sixty-five thousand, six hundred seven".