4445661 has 24 divisors (see below), whose sum is σ = 6711712. Its totient is φ = 2613600.

The previous prime is 4445659. The next prime is 4445663. The reversal of 4445661 is 1665444.

It is an interprime number because it is at equal distance from previous prime (4445659) and next prime (4445663).

It is not a de Polignac number, because 4445661 - 2¹ = 4445659 is a prime.

It is a Duffinian number.

It is a congruent number.

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

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13266 + ... + 13596.

Almost surely, 2^4445661 is an apocalyptic number.

It is an amenable number.

4445661 is a deficient number, since it is larger than the sum of its proper divisors (2266051).

4445661 is a wasteful number, since it uses less digits than its factorization.

4445661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 382 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

The square root of 4445661 is about 2108.4736185212. The cubic root of 4445661 is about 164.4291383402.

It can be divided in two parts, 444 and 5661, that added together give a triangular number (6105 = T₁₁₀).

The spelling of 4445661 in words is "four million, four hundred forty-five thousand, six hundred sixty-one".