666201224 has 32 divisors (see below), whose sum is σ = 1391607000. Its totient is φ = 296873472.

The previous prime is 666201203. The next prime is 666201227. The reversal of 666201224 is 422102666.

666201224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 258888100 + 407313124 = 16090^2 + 20182^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (666201227) 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, 107429 + ... + 113460.

Almost surely, 2^666201224 is an apocalyptic number.

It is an amenable number.

666201224 is an abundant number, since it is smaller than the sum of its proper divisors (725405776).

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

666201224 is a wasteful number, since it uses less digits than its factorization.

666201224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220937 (or 220933 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 666201224 is about 25810.8741425005. The cubic root of 666201224 is about 873.3771165950.

The spelling of 666201224 in words is "six hundred sixty-six million, two hundred one thousand, two hundred twenty-four".