4445666 has 8 divisors (see below), whose sum is σ = 6679260. Its totient is φ = 2219248.

The previous prime is 4445663. The next prime is 4445681. The reversal of 4445666 is 6665444.

It can be written as a sum of positive squares in 2 ways, for example, as 4431025 + 14641 = 2105^2 + 121^2 .

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

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (4445663) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200 + ... + 2988.

Almost surely, 2^4445666 is an apocalyptic number.

4445666 is a deficient number, since it is larger than the sum of its proper divisors (2233594).

4445666 is a wasteful number, since it uses less digits than its factorization.

4445666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588.

The product of its digits is 69120, while the sum is 35.

The square root of 4445666 is about 2108.4748042128. The cubic root of 4445666 is about 164.4291999842.

The spelling of 4445666 in words is "four million, four hundred forty-five thousand, six hundred sixty-six".