66616113 has 16 divisors (see below), whose sum is σ = 90351360. Its totient is φ = 43652736.

The previous prime is 66616097. The next prime is 66616127. The reversal of 66616113 is 31161666.

It is not a de Polignac number, because 66616113 - 2⁴ = 66616097 is a prime.

It is a super-3 number, since 3×66616113³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (66616313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44056 + ... + 45542.

It is an arithmetic number, because the mean of its divisors is an integer number (5646960).

Almost surely, 2^66616113 is an apocalyptic number.

It is an amenable number.

66616113 is a deficient number, since it is larger than the sum of its proper divisors (23735247).

66616113 is a wasteful number, since it uses less digits than its factorization.

66616113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1736.

The product of its digits is 3888, while the sum is 30.

The square root of 66616113 is about 8161.8694549717. The cubic root of 66616113 is about 405.3776145830.

Adding to 66616113 its reverse (31161666), we get a palindrome (97777779).

The spelling of 66616113 in words is "sixty-six million, six hundred sixteen thousand, one hundred thirteen".