660247998289 has 8 divisors (see below), whose sum is σ = 720276439680. Its totient is φ = 600220539600.

The previous prime is 660247998287. The next prime is 660247998341. The reversal of 660247998289 is 982899742066.

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

It is not a de Polignac number, because 660247998289 - 2¹ = 660247998287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (660247998283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2370247 + ... + 2634115.

It is an arithmetic number, because the mean of its divisors is an integer number (90034554960).

Almost surely, 2^660247998289 is an apocalyptic number.

It is an amenable number.

660247998289 is a deficient number, since it is larger than the sum of its proper divisors (60028441391).

660247998289 is a wasteful number, since it uses less digits than its factorization.

660247998289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491351.

The product of its (nonzero) digits is 188116992, while the sum is 70.

The spelling of 660247998289 in words is "six hundred sixty billion, two hundred forty-seven million, nine hundred ninety-eight thousand, two hundred eighty-nine".