666000224420 has 24 divisors (see below), whose sum is σ = 1446828075000. Its totient is φ = 257213879552.

The previous prime is 666000224411. The next prime is 666000224497. The reversal of 666000224420 is 24422000666.

It can be written as a sum of positive squares in 4 ways, for example, as 149349785764 + 516650438656 = 386458^2 + 718784^2 .

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 7 ways as a sum of consecutive naturals, for example, 574137545 + ... + 574138704.

It is an arithmetic number, because the mean of its divisors is an integer number (60284503125).

Almost surely, 2^666000224420 is an apocalyptic number.

It is an amenable number.

666000224420 is an abundant number, since it is smaller than the sum of its proper divisors (780827850580).

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

666000224420 is a wasteful number, since it uses less digits than its factorization.

666000224420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148276287 (or 1148276285 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The spelling of 666000224420 in words is "six hundred sixty-six billion, two hundred twenty-four thousand, four hundred twenty".