664067602 has 12 divisors (see below), whose sum is σ = 1094888718. Its totient is φ = 301848800.

The previous prime is 664067587. The next prime is 664067603. The reversal of 664067602 is 206760466.

664067602 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 543309481 + 120758121 = 23309^2 + 10989^2 .

It is not an unprimeable number, because it can be changed into a prime (664067603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1371799 + ... + 1372282.

Almost surely, 2^664067602 is an apocalyptic number.

664067602 is a deficient number, since it is larger than the sum of its proper divisors (430821116).

664067602 is a wasteful number, since it uses less digits than its factorization.

664067602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2744105 (or 2744094 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 664067602 is about 25769.5091532610. The cubic root of 664067602 is about 872.4437401840.

The spelling of 664067602 in words is "six hundred sixty-four million, sixty-seven thousand, six hundred two".