4511661 has 16 divisors (see below), whose sum is σ = 7500288. Its totient is φ = 2343600.

The previous prime is 4511653. The next prime is 4511699. The reversal of 4511661 is 1661154.

It is not a de Polignac number, because 4511661 - 2³ = 4511653 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4511161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9535 + ... + 9996.

It is an arithmetic number, because the mean of its divisors is an integer number (468768).

Almost surely, 2^4511661 is an apocalyptic number.

It is an amenable number.

4511661 is a deficient number, since it is larger than the sum of its proper divisors (2988627).

4511661 is a wasteful number, since it uses less digits than its factorization.

4511661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19552.

The product of its digits is 720, while the sum is 24.

The square root of 4511661 is about 2124.0670893359. The cubic root of 4511661 is about 165.2388460104.

It can be divided in two parts, 451 and 1661, that added together give a palindrome (2112).

The spelling of 4511661 in words is "four million, five hundred eleven thousand, six hundred sixty-one".