66601516116 has 48 divisors (see below), whose sum is σ = 167751964800. Its totient is φ = 20503012992.

The previous prime is 66601516103. The next prime is 66601516117. The reversal of 66601516116 is 61161510666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66601516117) 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 15 ways as a sum of consecutive naturals, for example, 4152511 + ... + 4168518.

It is an arithmetic number, because the mean of its divisors is an integer number (3494832600).

Almost surely, 2^66601516116 is an apocalyptic number.

It is an amenable number.

66601516116 is an abundant number, since it is smaller than the sum of its proper divisors (101150448684).

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

66601516116 is a wasteful number, since it uses less digits than its factorization.

66601516116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8321088 (or 8321086 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 66601516116 in words is "sixty-six billion, six hundred one million, five hundred sixteen thousand, one hundred sixteen".