660784042889 has 8 divisors (see below), whose sum is σ = 664694214912. Its totient is φ = 656882326800.

The previous prime is 660784042817. The next prime is 660784042913. The reversal of 660784042889 is 988240487066.

660784042889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 660784042889 - 2¹⁶ = 660783977353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660784042489) 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, 1957199 + ... + 2269844.

It is an arithmetic number, because the mean of its divisors is an integer number (83086776864).

Almost surely, 2^660784042889 is an apocalyptic number.

It is an amenable number.

660784042889 is a deficient number, since it is larger than the sum of its proper divisors (3910172023).

660784042889 is a wasteful number, since it uses less digits than its factorization.

660784042889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4227967.

The product of its (nonzero) digits is 37158912, while the sum is 62.

The spelling of 660784042889 in words is "six hundred sixty billion, seven hundred eighty-four million, forty-two thousand, eight hundred eighty-nine".