66448566 has 16 divisors (see below), whose sum is σ = 147663600. Its totient is φ = 22149504.

The previous prime is 66448561. The next prime is 66448579. The reversal of 66448566 is 66584466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66448561) 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, 615211 + ... + 615318.

It is an arithmetic number, because the mean of its divisors is an integer number (9228975).

Almost surely, 2^66448566 is an apocalyptic number.

66448566 is an abundant number, since it is smaller than the sum of its proper divisors (81215034).

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

66448566 is a wasteful number, since it uses less digits than its factorization.

66448566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230540 (or 1230534 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 66448566 is about 8151.5989842484. The cubic root of 66448566 is about 405.0374725273.

The spelling of 66448566 in words is "sixty-six million, four hundred forty-eight thousand, five hundred sixty-six".