664374408 has 32 divisors (see below), whose sum is σ = 1672893600. Its totient is φ = 219863808.

The previous prime is 664374401. The next prime is 664374419. The reversal of 664374408 is 804473466.

It is a self number, because there is not a number n which added to its sum of digits gives 664374408.

It is not an unprimeable number, because it can be changed into a prime (664374401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96241 + ... + 102912.

It is an arithmetic number, because the mean of its divisors is an integer number (52277925).

Almost surely, 2^664374408 is an apocalyptic number.

It is an amenable number.

664374408 is an abundant number, since it is smaller than the sum of its proper divisors (1008519192).

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

664374408 is a wasteful number, since it uses less digits than its factorization.

664374408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199301 (or 199297 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The square root of 664374408 is about 25775.4613537760. The cubic root of 664374408 is about 872.5780787974.

The spelling of 664374408 in words is "six hundred sixty-four million, three hundred seventy-four thousand, four hundred eight".