66223230 has 16 divisors (see below), whose sum is σ = 158935824. Its totient is φ = 17659520.

The previous prime is 66223219. The next prime is 66223231. The reversal of 66223230 is 3232266.

It is a self number, because there is not a number n which added to its sum of digits gives 66223230.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66223231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103691 + ... + 1103750.

It is an arithmetic number, because the mean of its divisors is an integer number (9933489).

Almost surely, 2^66223230 is an apocalyptic number.

66223230 is an abundant number, since it is smaller than the sum of its proper divisors (92712594).

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

66223230 is a wasteful number, since it uses less digits than its factorization.

66223230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2207451.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 66223230 is about 8137.7656638662. The cubic root of 66223230 is about 404.5791085460.

Adding to 66223230 its reverse (3232266), we get a palindrome (69455496).

The spelling of 66223230 in words is "sixty-six million, two hundred twenty-three thousand, two hundred thirty".