66003312016 has 10 divisors (see below), whose sum is σ = 127881417062. Its totient is φ = 33001656000.

The previous prime is 66003311999. The next prime is 66003312017. The reversal of 66003312016 is 61021330066.

It can be written as a sum of positive squares in only one way, i.e., 58912998400 + 7090313616 = 242720^2 + 84204^2 .

It is not an unprimeable number, because it can be changed into a prime (66003312017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2062603485 + ... + 2062603516.

Almost surely, 2^66003312016 is an apocalyptic number.

It is an amenable number.

66003312016 is a deficient number, since it is larger than the sum of its proper divisors (61878105046).

66003312016 is a wasteful number, since it uses less digits than its factorization.

66003312016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4125207009 (or 4125207003 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 66003312016 in words is "sixty-six billion, three million, three hundred twelve thousand, sixteen".