4391661 has 8 divisors (see below), whose sum is σ = 6200064. Its totient is φ = 2755520.

The previous prime is 4391659. The next prime is 4391671. The reversal of 4391661 is 1661934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4391661 - 2¹ = 4391659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4391671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43005 + ... + 43106.

It is an arithmetic number, because the mean of its divisors is an integer number (775008).

Almost surely, 2^4391661 is an apocalyptic number.

It is an amenable number.

4391661 is a deficient number, since it is larger than the sum of its proper divisors (1808403).

4391661 is a wasteful number, since it uses less digits than its factorization.

4391661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86131.

The product of its digits is 3888, while the sum is 30.

The square root of 4391661 is about 2095.6290225133. The cubic root of 4391661 is about 163.7606686521.

The spelling of 4391661 in words is "four million, three hundred ninety-one thousand, six hundred sixty-one".