66549222 has 16 divisors (see below), whose sum is σ = 147887280. Its totient is φ = 22183056.

The previous prime is 66549163. The next prime is 66549239. The reversal of 66549222 is 22294566.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616143 + ... + 616250.

It is an arithmetic number, because the mean of its divisors is an integer number (9242955).

Almost surely, 2^66549222 is an apocalyptic number.

66549222 is an abundant number, since it is smaller than the sum of its proper divisors (81338058).

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

66549222 is a wasteful number, since it uses less digits than its factorization.

66549222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232404 (or 1232398 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 66549222 is about 8157.7706513483. The cubic root of 66549222 is about 405.2418856837.

It can be divided in two parts, 6654 and 9222, that added together give a square (15876 = 126²).

The spelling of 66549222 in words is "sixty-six million, five hundred forty-nine thousand, two hundred twenty-two".