66428336552448 has 960 divisors, whose sum is σ = 205563030266880. Its totient is φ = 19011325132800.

The previous prime is 66428336552387. The next prime is 66428336552483. The reversal of 66428336552448 is 84425563382466.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 65575849990 + ... + 65575851002.

It is an arithmetic number, because the mean of its divisors is an integer number (214128156528).

Almost surely, 2^{66428336552448} 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 66428336552448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102781515133440).

66428336552448 is an abundant number, since it is smaller than the sum of its proper divisors (139134693714432).

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

66428336552448 is a wasteful number, since it uses less digits than its factorization.

66428336552448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401 (or 1372 counting only the distinct ones).

The product of its digits is 796262400, while the sum is 66.

The spelling of 66428336552448 in words is "sixty-six trillion, four hundred twenty-eight billion, three hundred thirty-six million, five hundred fifty-two thousand, four hundred forty-eight".