660680752169 has 8 divisors (see below), whose sum is σ = 705052551168. Its totient is φ = 616920978240.

The previous prime is 660680752159. The next prime is 660680752177. The reversal of 660680752169 is 961257086066.

It is a happy number.

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 660680752169 - 2⁴ = 660680752153 is a prime.

It is a super-2 number, since 2×660680752169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (660680752159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153004037 + ... + 153008354.

It is an arithmetic number, because the mean of its divisors is an integer number (88131568896).

Almost surely, 2^660680752169 is an apocalyptic number.

It is an amenable number.

660680752169 is a deficient number, since it is larger than the sum of its proper divisors (44371798999).

660680752169 is a wasteful number, since it uses less digits than its factorization.

660680752169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306012535.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 660680752169 in words is "six hundred sixty billion, six hundred eighty million, seven hundred fifty-two thousand, one hundred sixty-nine".