66063227664 has 120 divisors (see below), whose sum is σ = 199675523520. Its totient is φ = 18765987072.

The previous prime is 66063227647. The next prime is 66063227687. The reversal of 66063227664 is 46672236066.

It is a happy number.

66063227664 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 325717 + ... + 488075.

It is an arithmetic number, because the mean of its divisors is an integer number (1663962696).

Almost surely, 2^66063227664 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 66063227664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99837761760).

66063227664 is an abundant number, since it is smaller than the sum of its proper divisors (133612295856).

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

66063227664 is a wasteful number, since it uses less digits than its factorization.

66063227664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162557 (or 162544 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 48.

The spelling of 66063227664 in words is "sixty-six billion, sixty-three million, two hundred twenty-seven thousand, six hundred sixty-four".