66224066 has 4 divisors (see below), whose sum is σ = 99336102. Its totient is φ = 33112032.

The previous prime is 66224057. The next prime is 66224071. The reversal of 66224066 is 66042266.

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

It can be written as a sum of positive squares in only one way, i.e., 50055625 + 16168441 = 7075^2 + 4021^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16556015 + ... + 16556018.

Almost surely, 2^66224066 is an apocalyptic number.

66224066 is a deficient number, since it is larger than the sum of its proper divisors (33112036).

66224066 is a wasteful number, since it uses less digits than its factorization.

66224066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33112035.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 66224066 is about 8137.8170291547. The cubic root of 66224066 is about 404.5808110035.

The spelling of 66224066 in words is "sixty-six million, two hundred twenty-four thousand, sixty-six".