66616311066 has 32 divisors (see below), whose sum is σ = 133928722176. Its totient is φ = 22089672000.

The previous prime is 66616311059. The next prime is 66616311067. The reversal of 66616311066 is 66011361666.

It is not an unprimeable number, because it can be changed into a prime (66616311067) 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, 1043796 + ... + 1105776.

It is an arithmetic number, because the mean of its divisors is an integer number (4185272568).

Almost surely, 2^66616311066 is an apocalyptic number.

66616311066 is an abundant number, since it is smaller than the sum of its proper divisors (67312411110).

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

66616311066 is a wasteful number, since it uses less digits than its factorization.

66616311066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62918.

The product of its (nonzero) digits is 139968, while the sum is 42.

The spelling of 66616311066 in words is "sixty-six billion, six hundred sixteen million, three hundred eleven thousand, sixty-six".