66228844 has 12 divisors (see below), whose sum is σ = 126436968. Its totient is φ = 30104000.

The previous prime is 66228829. The next prime is 66228881. The reversal of 66228844 is 44882266.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66228797 and 66228806.

It is an unprimeable number.

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, 752557 + ... + 752644.

It is an arithmetic number, because the mean of its divisors is an integer number (10536414).

Almost surely, 2^66228844 is an apocalyptic number.

It is an amenable number.

66228844 is a deficient number, since it is larger than the sum of its proper divisors (60208124).

66228844 is a wasteful number, since it uses less digits than its factorization.

66228844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1505216 (or 1505214 counting only the distinct ones).

The product of its digits is 147456, while the sum is 40.

The square root of 66228844 is about 8138.1105915317. The cubic root of 66228844 is about 404.5905408029.

The spelling of 66228844 in words is "sixty-six million, two hundred twenty-eight thousand, eight hundred forty-four".