66722746587841 has 8 divisors (see below), whose sum is σ = 66808755889344. Its totient is φ = 66636772872240.

The previous prime is 66722746587821. The next prime is 66722746587853. The reversal of 66722746587841 is 14878564722766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66722746587841 - 2¹³ = 66722746579649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66722746587811) 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, 5143086 + ... + 12645031.

It is an arithmetic number, because the mean of its divisors is an integer number (8351094486168).

Almost surely, 2^{66722746587841} is an apocalyptic number.

It is an amenable number.

66722746587841 is a deficient number, since it is larger than the sum of its proper divisors (86009301503).

66722746587841 is a wasteful number, since it uses less digits than its factorization.

66722746587841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17792951.

The product of its digits is 1517322240, while the sum is 73.

The spelling of 66722746587841 in words is "sixty-six trillion, seven hundred twenty-two billion, seven hundred forty-six million, five hundred eighty-seven thousand, eight hundred forty-one".