220660445 has 8 divisors (see below), whose sum is σ = 264906240. Its totient is φ = 176452560.

The previous prime is 220660439. The next prime is 220660481. The reversal of 220660445 is 544066022.

220660445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 220660445 - 2¹⁰ = 220659421 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5480 + ... + 21710.

It is an arithmetic number, because the mean of its divisors is an integer number (33113280).

Almost surely, 2^220660445 is an apocalyptic number.

It is an amenable number.

220660445 is a deficient number, since it is larger than the sum of its proper divisors (44245795).

220660445 is a wasteful number, since it uses less digits than its factorization.

220660445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18955.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 220660445 is about 14854.6438866773. The cubic root of 220660445 is about 604.2845582916.

The spelling of 220660445 in words is "two hundred twenty million, six hundred sixty thousand, four hundred forty-five".