66756248250 has 128 divisors (see below), whose sum is σ = 176779100160. Its totient is φ = 16731489600.

The previous prime is 66756248239. The next prime is 66756248309. The reversal of 66756248250 is 5284265766.

It is a junction number, because it is equal to n+sod(n) for n = 66756248193 and 66756248202.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1791307 + ... + 1828193.

It is an arithmetic number, because the mean of its divisors is an integer number (1381086720).

Almost surely, 2^66756248250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66756248250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88389550080).

66756248250 is an abundant number, since it is smaller than the sum of its proper divisors (110022851910).

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

66756248250 is a wasteful number, since it uses less digits than its factorization.

66756248250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37053 (or 37043 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 51.

The spelling of 66756248250 in words is "sixty-six billion, seven hundred fifty-six million, two hundred forty-eight thousand, two hundred fifty".