66870185313 has 8 divisors (see below), whose sum is σ = 89176801248. Its totient is φ = 44571846464.

The previous prime is 66870185269. The next prime is 66870185339. The reversal of 66870185313 is 31358107866.

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 66870185313 - 2¹⁴ = 66870168929 is a prime.

It is a super-3 number, since 3×66870185313³ (a number of 33 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66870185353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2050395 + ... + 2082752.

It is an arithmetic number, because the mean of its divisors is an integer number (11147100156).

Almost surely, 2^66870185313 is an apocalyptic number.

It is an amenable number.

66870185313 is a deficient number, since it is larger than the sum of its proper divisors (22306615935).

66870185313 is a wasteful number, since it uses less digits than its factorization.

66870185313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138543.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 66870185313 in words is "sixty-six billion, eight hundred seventy million, one hundred eighty-five thousand, three hundred thirteen".