664650250602 has 64 divisors (see below), whose sum is σ = 1468015871616. Its totient is φ = 199309501440.

The previous prime is 664650250601. The next prime is 664650250633. The reversal of 664650250602 is 206052056466.

It is not an unprimeable number, because it can be changed into a prime (664650250601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2938653 + ... + 3156735.

It is an arithmetic number, because the mean of its divisors is an integer number (22937747994).

Almost surely, 2^664650250602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664650250602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734007935808).

664650250602 is an abundant number, since it is smaller than the sum of its proper divisors (803365621014).

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

664650250602 is a wasteful number, since it uses less digits than its factorization.

664650250602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219095.

The product of its (nonzero) digits is 518400, while the sum is 42.

The spelling of 664650250602 in words is "six hundred sixty-four billion, six hundred fifty million, two hundred fifty thousand, six hundred two".