664356606 has 32 divisors (see below), whose sum is σ = 1343485440. Its totient is φ = 218999424.

The previous prime is 664356599. The next prime is 664356607. The reversal of 664356606 is 606653466.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664356607) 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, 418891 + ... + 420473.

It is an arithmetic number, because the mean of its divisors is an integer number (41983920).

Almost surely, 2^664356606 is an apocalyptic number.

664356606 is an abundant number, since it is smaller than the sum of its proper divisors (679128834).

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

664356606 is a wasteful number, since it uses less digits than its factorization.

664356606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320.

The product of its (nonzero) digits is 466560, while the sum is 42.

The square root of 664356606 is about 25775.1160230172. The cubic root of 664356606 is about 872.5702851128.

The spelling of 664356606 in words is "six hundred sixty-four million, three hundred fifty-six thousand, six hundred six".