6660697813929 has 10 divisors (see below), whose sum is σ = 9949931302410. Its totient is φ = 4440465209232.

The previous prime is 6660697813867. The next prime is 6660697813943. The reversal of 6660697813929 is 9293187960666.

It can be written as a sum of positive squares in only one way, i.e., 3512475705600 + 3148222108329 = 1874160^2 + 1774323^2 .

It is not a de Polignac number, because 6660697813929 - 2⁹ = 6660697813417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6660697823929) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41115418524 + ... + 41115418685.

It is an arithmetic number, because the mean of its divisors is an integer number (994993130241).

Almost surely, 2^{6660697813929} is an apocalyptic number.

It is an amenable number.

6660697813929 is a deficient number, since it is larger than the sum of its proper divisors (3289233488481).

6660697813929 is an equidigital number, since it uses as much as digits as its factorization.

6660697813929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82230837221 (or 82230837212 counting only the distinct ones).

The product of its (nonzero) digits is 317447424, while the sum is 72.

The spelling of 6660697813929 in words is "six trillion, six hundred sixty billion, six hundred ninety-seven million, eight hundred thirteen thousand, nine hundred twenty-nine".