667405224 has 128 divisors (see below), whose sum is σ = 1903564800. Its totient is φ = 216596160.

The previous prime is 667405177. The next prime is 667405253. The reversal of 667405224 is 422504766.

667405224 is a `hidden beast` number, since 66 + 74 + 0 + 522 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1548289 + ... + 1548719.

It is an arithmetic number, because the mean of its divisors is an integer number (14871600).

Almost surely, 2^667405224 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 667405224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951782400).

667405224 is an abundant number, since it is smaller than the sum of its proper divisors (1236159576).

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

667405224 is a wasteful number, since it uses less digits than its factorization.

667405224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 610 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 667405224 is about 25834.1871170742. The cubic root of 667405224 is about 873.9029403115.

The spelling of 667405224 in words is "six hundred sixty-seven million, four hundred five thousand, two hundred twenty-four".