664455704724424 has 64 divisors (see below), whose sum is σ = 1332782747276400. Its totient is φ = 309451411390464.

The previous prime is 664455704724421. The next prime is 664455704724431. The reversal of 664455704724424 is 424427407554466.

664455704724424 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 8 ways, for example, as 410002481196324 + 254453223528100 = 20248518^2 + 15951590^2 .

It is not an unprimeable number, because it can be changed into a prime (664455704724421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412541182 + ... + 414148690.

Almost surely, 2^{664455704724424} is an apocalyptic number.

It is an amenable number.

664455704724424 is an abundant number, since it is smaller than the sum of its proper divisors (668327042551976).

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

664455704724424 is a wasteful number, since it uses less digits than its factorization.

664455704724424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1638962 (or 1638958 counting only the distinct ones).

The product of its (nonzero) digits is 722534400, while the sum is 64.

The spelling of 664455704724424 in words is "six hundred sixty-four trillion, four hundred fifty-five billion, seven hundred four million, seven hundred twenty-four thousand, four hundred twenty-four".