66471347115 has 80 divisors (see below), whose sum is σ = 124384360320. Its totient is φ = 33927310080.

The previous prime is 66471347113. The next prime is 66471347119. The reversal of 66471347115 is 51174317466.

It is a happy number.

66471347115 is a `hidden beast` number, since 66 + 471 + 3 + 4 + 7 + 115 = 666.

It is not a de Polignac number, because 66471347115 - 2¹ = 66471347113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (66471347113) 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 79 ways as a sum of consecutive naturals, for example, 877726 + ... + 950444.

It is an arithmetic number, because the mean of its divisors is an integer number (1554804504).

Almost surely, 2^66471347115 is an apocalyptic number.

66471347115 is a deficient number, since it is larger than the sum of its proper divisors (57913013205).

66471347115 is a wasteful number, since it uses less digits than its factorization.

66471347115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72834 (or 72825 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 66471347115 in words is "sixty-six billion, four hundred seventy-one million, three hundred forty-seven thousand, one hundred fifteen".