66147113 has 12 divisors (see below), whose sum is σ = 70568820. Its totient is φ = 61986816.

The previous prime is 66147097. The next prime is 66147131. The reversal of 66147113 is 31174166.

It can be written as a sum of positive squares in 2 ways, for example, as 30780304 + 35366809 = 5548^2 + 5947^2 .

It is not a de Polignac number, because 66147113 - 2⁴ = 66147097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66147143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34073 + ... + 35961.

It is an arithmetic number, because the mean of its divisors is an integer number (5880735).

Almost surely, 2^66147113 is an apocalyptic number.

It is an amenable number.

66147113 is a deficient number, since it is larger than the sum of its proper divisors (4421707).

66147113 is a wasteful number, since it uses less digits than its factorization.

66147113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024 (or 2005 counting only the distinct ones).

The product of its digits is 3024, while the sum is 29.

The square root of 66147113 is about 8133.0875441003. The cubic root of 66147113 is about 404.4240413374.

It can be divided in two parts, 661 and 47113, that added together give a palindrome (47774).

The spelling of 66147113 in words is "sixty-six million, one hundred forty-seven thousand, one hundred thirteen".