3646665 has 48 divisors (see below), whose sum is σ = 7076160. Its totient is φ = 1722240.

The previous prime is 3646661. The next prime is 3646681. The reversal of 3646665 is 5666463.

It is not a de Polignac number, because 3646665 - 2² = 3646661 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3646661) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26166 + ... + 26304.

It is an arithmetic number, because the mean of its divisors is an integer number (147420).

Almost surely, 2^3646665 is an apocalyptic number.

It is an amenable number.

3646665 is a deficient number, since it is larger than the sum of its proper divisors (3429495).

3646665 is a wasteful number, since it uses less digits than its factorization.

3646665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 211 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 3646665 is about 1909.6243086010. The cubic root of 3646665 is about 153.9212646375.

The spelling of 3646665 in words is "three million, six hundred forty-six thousand, six hundred sixty-five".