66311135347208 has 32 divisors (see below), whose sum is σ = 135893787816960. Its totient is φ = 30198619511040.

The previous prime is 66311135347207. The next prime is 66311135347231. The reversal of 66311135347208 is 80274353111366.

It is not an unprimeable number, because it can be changed into a prime (66311135347207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7864219616 + ... + 7864228047.

It is an arithmetic number, because the mean of its divisors is an integer number (4246680869280).

Almost surely, 2^{66311135347208} is an apocalyptic number.

66311135347208 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

66311135347208 is an abundant number, since it is smaller than the sum of its proper divisors (69582652469752).

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

66311135347208 is a wasteful number, since it uses less digits than its factorization.

66311135347208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15728447717 (or 15728447713 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 66311135347208 in words is "sixty-six trillion, three hundred eleven billion, one hundred thirty-five million, three hundred forty-seven thousand, two hundred eight".