664420336 has 20 divisors (see below), whose sum is σ = 1303612000. Its totient is φ = 328004352.

The previous prime is 664420331. The next prime is 664420381. The reversal of 664420336 is 633024466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664420331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261561 + ... + 264088.

It is an arithmetic number, because the mean of its divisors is an integer number (65180600).

Almost surely, 2^664420336 is an apocalyptic number.

It is an amenable number.

664420336 is a deficient number, since it is larger than the sum of its proper divisors (639191664).

664420336 is a wasteful number, since it uses less digits than its factorization.

664420336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525736 (or 525730 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 34.

The square root of 664420336 is about 25776.3522632664. The cubic root of 664420336 is about 872.5981853528.

The spelling of 664420336 in words is "six hundred sixty-four million, four hundred twenty thousand, three hundred thirty-six".