66220116 has 24 divisors (see below), whose sum is σ = 155934240. Its totient is φ = 21870432.

The previous prime is 66220109. The next prime is 66220153. The reversal of 66220116 is 61102266.

66220116 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24006 + ... + 26621.

It is an arithmetic number, because the mean of its divisors is an integer number (6497260).

Almost surely, 2^66220116 is an apocalyptic number.

It is an amenable number.

66220116 is an abundant number, since it is smaller than the sum of its proper divisors (89714124).

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

66220116 is a wasteful number, since it uses less digits than its factorization.

66220116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50743 (or 50741 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 66220116 is about 8137.5743314577. The cubic root of 66220116 is about 404.5727669692.

The spelling of 66220116 in words is "sixty-six million, two hundred twenty thousand, one hundred sixteen".