66322866 has 16 divisors (see below), whose sum is σ = 132774624. Its totient is φ = 22086144.

The previous prime is 66322853. The next prime is 66322897. The reversal of 66322866 is 66822366.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2125 + ... + 11711.

It is an arithmetic number, because the mean of its divisors is an integer number (8298414).

Almost surely, 2^66322866 is an apocalyptic number.

66322866 is an abundant number, since it is smaller than the sum of its proper divisors (66451758).

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

66322866 is a wasteful number, since it uses less digits than its factorization.

66322866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10745.

The product of its digits is 124416, while the sum is 39.

The square root of 66322866 is about 8143.8851907428. The cubic root of 66322866 is about 404.7819097107.

Subtracting 66322866 from its reverse (66822366), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 66322866 in words is "sixty-six million, three hundred twenty-two thousand, eight hundred sixty-six".