66224208 has 40 divisors (see below), whose sum is σ = 171491008. Its totient is φ = 22021632.

The previous prime is 66224201. The next prime is 66224209. The reversal of 66224208 is 80242266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66224201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21960 + ... + 24792.

Almost surely, 2^66224208 is an apocalyptic number.

It is an amenable number.

66224208 is an abundant number, since it is smaller than the sum of its proper divisors (105266800).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66224208 is a wasteful number, since it uses less digits than its factorization.

66224208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331 (or 3325 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 66224208 is about 8137.8257538485. The cubic root of 66224208 is about 404.5811001755.

The spelling of 66224208 in words is "sixty-six million, two hundred twenty-four thousand, two hundred eight".