664222064424 has 64 divisors (see below), whose sum is σ = 1684155732480. Its totient is φ = 218261400000.

The previous prime is 664222064413. The next prime is 664222064461. The reversal of 664222064424 is 424460222466.

It is a happy number.

664222064424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 16902799 + ... + 16942049.

It is an arithmetic number, because the mean of its divisors is an integer number (26314933320).

Almost surely, 2^664222064424 is an apocalyptic number.

It is an amenable number.

664222064424 is an abundant number, since it is smaller than the sum of its proper divisors (1019933668056).

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

664222064424 is a wasteful number, since it uses less digits than its factorization.

664222064424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49262 (or 49258 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 42.

The spelling of 664222064424 in words is "six hundred sixty-four billion, two hundred twenty-two million, sixty-four thousand, four hundred twenty-four".