664822628272 has 160 divisors (see below), whose sum is σ = 1498440093696. Its totient is φ = 282783494400.

The previous prime is 664822628269. The next prime is 664822628287. The reversal of 664822628272 is 272826228466.

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, 34596747 + ... + 34615957.

Almost surely, 2^664822628272 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 664822628272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749220046848).

664822628272 is an abundant number, since it is smaller than the sum of its proper divisors (833617465424).

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

664822628272 is a wasteful number, since it uses less digits than its factorization.

664822628272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19439 (or 19433 counting only the distinct ones).

The product of its digits is 12386304, while the sum is 55.

The spelling of 664822628272 in words is "six hundred sixty-four billion, eight hundred twenty-two million, six hundred twenty-eight thousand, two hundred seventy-two".