4447661 has 4 divisors (see below), whose sum is σ = 4514112. Its totient is φ = 4381212.

The previous prime is 4447649. The next prime is 4447679. The reversal of 4447661 is 1667444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4447661 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4447061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33125 + ... + 33258.

It is an arithmetic number, because the mean of its divisors is an integer number (1128528).

Almost surely, 2^4447661 is an apocalyptic number.

It is an amenable number.

4447661 is a deficient number, since it is larger than the sum of its proper divisors (66451).

4447661 is an equidigital number, since it uses as much as digits as its factorization.

4447661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66450.

The product of its digits is 16128, while the sum is 32.

The square root of 4447661 is about 2108.9478419345. The cubic root of 4447661 is about 164.4537922648.

The spelling of 4447661 in words is "four million, four hundred forty-seven thousand, six hundred sixty-one".