66192220 has 24 divisors (see below), whose sum is σ = 147181104. Its totient is φ = 24919296.

The previous prime is 66192211. The next prime is 66192227. The reversal of 66192220 is 2229166.

66192220 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 not an unprimeable number, because it can be changed into a prime (66192227) by changing a digit.

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, 97002 + ... + 97681.

It is an arithmetic number, because the mean of its divisors is an integer number (6132546).

Almost surely, 2^66192220 is an apocalyptic number.

It is an amenable number.

66192220 is an abundant number, since it is smaller than the sum of its proper divisors (80988884).

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

66192220 is a wasteful number, since it uses less digits than its factorization.

66192220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194709 (or 194707 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 66192220 is about 8135.8601266246. The cubic root of 66192220 is about 404.5159486501.

The spelling of 66192220 in words is "sixty-six million, one hundred ninety-two thousand, two hundred twenty".