664466662244 has 96 divisors (see below), whose sum is σ = 1469116438272. Its totient is φ = 255441600000.

The previous prime is 664466662201. The next prime is 664466662259. The reversal of 664466662244 is 442266664466.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 664466662244.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9078194 + ... + 9151094.

It is an arithmetic number, because the mean of its divisors is an integer number (15303296232).

It is a self-describing number.

Almost surely, 2^664466662244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 664466662244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (734558219136).

664466662244 is an abundant number, since it is smaller than the sum of its proper divisors (804649776028).

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

664466662244 is a wasteful number, since it uses less digits than its factorization.

664466662244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73317 (or 73315 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 56.

The spelling of 664466662244 in words is "six hundred sixty-four billion, four hundred sixty-six million, six hundred sixty-two thousand, two hundred forty-four".