66066616 has 32 divisors (see below), whose sum is σ = 154442880. Its totient is φ = 25740000.

The previous prime is 66066587. The next prime is 66066617. The reversal of 66066616 is 61666066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66066617) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53010 + ... + 54241.

It is an arithmetic number, because the mean of its divisors is an integer number (4826340).

Almost surely, 2^66066616 is an apocalyptic number.

It is an amenable number.

66066616 is an abundant number, since it is smaller than the sum of its proper divisors (88376264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66066616 is a wasteful number, since it uses less digits than its factorization.

66066616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107275 (or 107271 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 66066616 is about 8128.1373019899. The cubic root of 66066616 is about 404.2599216185.

It can be divided in two parts, 660 and 66616, that added together give a palindrome (67276).

The spelling of 66066616 in words is "sixty-six million, sixty-six thousand, six hundred sixteen".