66228646704 has 80 divisors (see below), whose sum is σ = 187179686400. Its totient is φ = 20011726080.

The previous prime is 66228646657. The next prime is 66228646753. The reversal of 66228646704 is 40764682266.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

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 15 ways as a sum of consecutive naturals, for example, 4569 + ... + 363975.

It is an arithmetic number, because the mean of its divisors is an integer number (2339746080).

Almost surely, 2^66228646704 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 66228646704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93589843200).

66228646704 is an abundant number, since it is smaller than the sum of its proper divisors (120951039696).

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

66228646704 is a wasteful number, since it uses less digits than its factorization.

66228646704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359778 (or 359772 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 51.

The spelling of 66228646704 in words is "sixty-six billion, two hundred twenty-eight million, six hundred forty-six thousand, seven hundred four".