4420166645 has 4 divisors (see below), whose sum is σ = 5304199980. Its totient is φ = 3536133312.

The previous prime is 4420166633. The next prime is 4420166687. The reversal of 4420166645 is 5466610244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1137105841 + 3283060804 = 33721^2 + 57298^2 .

It is a cyclic number.

It is not a de Polignac number, because 4420166645 - 2¹⁰ = 4420165621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4420166599 and 4420166608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442016660 + ... + 442016669.

It is an arithmetic number, because the mean of its divisors is an integer number (1326049995).

Almost surely, 2^4420166645 is an apocalyptic number.

It is an amenable number.

4420166645 is a deficient number, since it is larger than the sum of its proper divisors (884033335).

4420166645 is an equidigital number, since it uses as much as digits as its factorization.

4420166645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884033334.

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 4420166645 is about 66484.3338313621. Note that the first 3 decimals coincide. The cubic root of 4420166645 is about 1641.1422051256.

Adding to 4420166645 its reverse (5466610244), we get a palindrome (9886776889).

The spelling of 4420166645 in words is "four billion, four hundred twenty million, one hundred sixty-six thousand, six hundred forty-five".