66884028 has 24 divisors (see below), whose sum is σ = 164277120. Its totient is φ = 21121200.

The previous prime is 66884021. The next prime is 66884029. The reversal of 66884028 is 82048866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66884021) 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, 146448 + ... + 146903.

It is an arithmetic number, because the mean of its divisors is an integer number (6844880).

Almost surely, 2^66884028 is an apocalyptic number.

It is an amenable number.

66884028 is an abundant number, since it is smaller than the sum of its proper divisors (97393092).

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

66884028 is a wasteful number, since it uses less digits than its factorization.

66884028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293377 (or 293375 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 66884028 is about 8178.2655862964. The cubic root of 66884028 is about 405.9203334833.

The spelling of 66884028 in words is "sixty-six million, eight hundred eighty-four thousand, twenty-eight".