66328687319 has 4 divisors (see below), whose sum is σ = 66338389920. Its totient is φ = 66318984720.

The previous prime is 66328687309. The next prime is 66328687331. The reversal of 66328687319 is 91378682366.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66328687319 - 2²⁴ = 66311910103 is a prime.

It is a super-2 number, since 2×66328687319² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66328687309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4841039 + ... + 4854720.

It is an arithmetic number, because the mean of its divisors is an integer number (16584597480).

Almost surely, 2^66328687319 is an apocalyptic number.

66328687319 is a deficient number, since it is larger than the sum of its proper divisors (9702601).

66328687319 is an equidigital number, since it uses as much as digits as its factorization.

66328687319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9702600.

The product of its digits is 15676416, while the sum is 59.

The spelling of 66328687319 in words is "sixty-six billion, three hundred twenty-eight million, six hundred eighty-seven thousand, three hundred nineteen".