66855235248 has 160 divisors (see below), whose sum is σ = 202590009600. Its totient is φ = 21050440704.

The previous prime is 66855235247. The next prime is 66855235273. The reversal of 66855235248 is 84253255866.

66855235248 is a `hidden beast` number, since 6 + 68 + 5 + 52 + 3 + 524 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 66855235194 and 66855235203.

It is not an unprimeable number, because it can be changed into a prime (66855235247) 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 31 ways as a sum of consecutive naturals, for example, 2836440 + ... + 2859912.

It is an arithmetic number, because the mean of its divisors is an integer number (1266187560).

Almost surely, 2^66855235248 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 66855235248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101295004800).

66855235248 is an abundant number, since it is smaller than the sum of its proper divisors (135734774352).

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

66855235248 is a wasteful number, since it uses less digits than its factorization.

66855235248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23856 (or 23844 counting only the distinct ones).

The product of its digits is 13824000, while the sum is 54.

The spelling of 66855235248 in words is "sixty-six billion, eight hundred fifty-five million, two hundred thirty-five thousand, two hundred forty-eight".