66707436347868 has 48 divisors (see below), whose sum is σ = 157784060397600. Its totient is φ = 21931048710144.

The previous prime is 66707436347863. The next prime is 66707436347887. The reversal of 66707436347868 is 86874363470766.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66707436347868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66707436347863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191537746 + ... + 191885702.

It is an arithmetic number, because the mean of its divisors is an integer number (3287167924950).

Almost surely, 2^{66707436347868} is an apocalyptic number.

It is an amenable number.

66707436347868 is an abundant number, since it is smaller than the sum of its proper divisors (91076624049732).

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

66707436347868 is a wasteful number, since it uses less digits than its factorization.

66707436347868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566886 (or 566884 counting only the distinct ones).

The product of its (nonzero) digits is 4096770048, while the sum is 75.

The spelling of 66707436347868 in words is "sixty-six trillion, seven hundred seven billion, four hundred thirty-six million, three hundred forty-seven thousand, eight hundred sixty-eight".