668146224 has 80 divisors (see below), whose sum is σ = 1806424064. Its totient is φ = 212544000.

The previous prime is 668146217. The next prime is 668146253. The reversal of 668146224 is 422641866.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105549 + ... + 111699.

Almost surely, 2^668146224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668146224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (903212032).

668146224 is an abundant number, since it is smaller than the sum of its proper divisors (1138277840).

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

668146224 is a wasteful number, since it uses less digits than its factorization.

668146224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6266 (or 6260 counting only the distinct ones).

The product of its digits is 110592, while the sum is 39.

The square root of 668146224 is about 25848.5246000618. The cubic root of 668146224 is about 874.2262434298.

The spelling of 668146224 in words is "six hundred sixty-eight million, one hundred forty-six thousand, two hundred twenty-four".