664800456 has 32 divisors (see below), whose sum is σ = 1715616000. Its totient is φ = 214451520.

The previous prime is 664800449. The next prime is 664800457. The reversal of 664800456 is 654008466.

It is not an unprimeable number, because it can be changed into a prime (664800457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 446031 + ... + 447518.

It is an arithmetic number, because the mean of its divisors is an integer number (53613000).

Almost surely, 2^664800456 is an apocalyptic number.

It is an amenable number.

664800456 is an abundant number, since it is smaller than the sum of its proper divisors (1050815544).

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

664800456 is a wasteful number, since it uses less digits than its factorization.

664800456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893589 (or 893585 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 664800456 is about 25783.7246339624. The cubic root of 664800456 is about 872.7645603466.

The spelling of 664800456 in words is "six hundred sixty-four million, eight hundred thousand, four hundred fifty-six".