66222192 has 20 divisors (see below), whose sum is σ = 171074120. Its totient is φ = 22074048.

The previous prime is 66222133. The next prime is 66222199. The reversal of 66222192 is 29122266.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66222199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 689767 + ... + 689862.

It is an arithmetic number, because the mean of its divisors is an integer number (8553706).

Almost surely, 2^66222192 is an apocalyptic number.

It is an amenable number.

66222192 is an abundant number, since it is smaller than the sum of its proper divisors (104851928).

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

66222192 is a wasteful number, since it uses less digits than its factorization.

66222192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379640 (or 1379634 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

The square root of 66222192 is about 8137.7018868966. The cubic root of 66222192 is about 404.5769947092.

The spelling of 66222192 in words is "sixty-six million, two hundred twenty-two thousand, one hundred ninety-two".