66357566748 has 144 divisors (see below), whose sum is σ = 187960945536. Its totient is φ = 19568926080.

The previous prime is 66357566719. The next prime is 66357566749. The reversal of 66357566748 is 84766575366.

66357566748 is a `hidden beast` number, since 6 + 63 + 5 + 7 + 566 + 7 + 4 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66357566749) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 2187090 + ... + 2217222.

It is an arithmetic number, because the mean of its divisors is an integer number (1305284344).

Almost surely, 2^66357566748 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 66357566748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93980472768).

66357566748 is an abundant number, since it is smaller than the sum of its proper divisors (121603378788).

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

66357566748 is a wasteful number, since it uses less digits than its factorization.

66357566748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30304 (or 30299 counting only the distinct ones).

The product of its digits is 152409600, while the sum is 63.

The spelling of 66357566748 in words is "sixty-six billion, three hundred fifty-seven million, five hundred sixty-six thousand, seven hundred forty-eight".