666100224 has 120 divisors (see below), whose sum is σ = 1984849152. Its totient is φ = 214824960.

The previous prime is 666100223. The next prime is 666100247. The reversal of 666100224 is 422001666.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (666100223) 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 11 ways as a sum of consecutive naturals, for example, 140517 + ... + 145179.

Almost surely, 2^666100224 is an apocalyptic number.

666100224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666100224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992424576).

666100224 is an abundant number, since it is smaller than the sum of its proper divisors (1318748928).

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

666100224 is a wasteful number, since it uses less digits than its factorization.

666100224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4718 (or 4699 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 666100224 is about 25808.9175286373. The cubic root of 666100224 is about 873.3329780055.

The spelling of 666100224 in words is "six hundred sixty-six million, one hundred thousand, two hundred twenty-four".