66266226240 has 112 divisors (see below), whose sum is σ = 210644524608. Its totient is φ = 17650059264.

The previous prime is 66266226227. The next prime is 66266226259. The reversal of 66266226240 is 4262266266.

It is a junction number, because it is equal to n+sod(n) for n = 66266226192 and 66266226201.

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, 778419 + ... + 859341.

It is an arithmetic number, because the mean of its divisors is an integer number (1880754684).

Almost surely, 2^66266226240 is an apocalyptic number.

66266226240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66266226240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105322262304).

66266226240 is an abundant number, since it is smaller than the sum of its proper divisors (144378298368).

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

66266226240 is a wasteful number, since it uses less digits than its factorization.

66266226240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81796 (or 81786 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 66266226240 in words is "sixty-six billion, two hundred sixty-six million, two hundred twenty-six thousand, two hundred forty".