66617314115 has 24 divisors (see below), whose sum is σ = 89526732624. Its totient is φ = 47534801600.

The previous prime is 66617314111. The next prime is 66617314117. The reversal of 66617314115 is 51141371666.

66617314115 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66617314115 - 2² = 66617314111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66617314111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006721 + ... + 1070850.

It is an arithmetic number, because the mean of its divisors is an integer number (3730280526).

Almost surely, 2^66617314115 is an apocalyptic number.

66617314115 is a deficient number, since it is larger than the sum of its proper divisors (22909418509).

66617314115 is a wasteful number, since it uses less digits than its factorization.

66617314115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077651 (or 2077640 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The spelling of 66617314115 in words is "sixty-six billion, six hundred seventeen million, three hundred fourteen thousand, one hundred fifteen".