664444602 has 24 divisors (see below), whose sum is σ = 1440107136. Its totient is φ = 221408136.

The previous prime is 664444601. The next prime is 664444661. The reversal of 664444602 is 206444466.

It is a happy number.

664444602 is a `hidden beast` number, since 6 + 6 + 4 + 4 + 44 + 602 = 666.

It is not an unprimeable number, because it can be changed into a prime (664444601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93913 + ... + 100739.

It is an arithmetic number, because the mean of its divisors is an integer number (60004464).

Almost surely, 2^664444602 is an apocalyptic number.

664444602 is an abundant number, since it is smaller than the sum of its proper divisors (775662534).

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

664444602 is a wasteful number, since it uses less digits than its factorization.

664444602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12242 (or 12239 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The square root of 664444602 is about 25776.8229617228. The cubic root of 664444602 is about 872.6088082515.

The spelling of 664444602 in words is "six hundred sixty-four million, four hundred forty-four thousand, six hundred two".