66031222568 has 16 divisors (see below), whose sum is σ = 123815741280. Its totient is φ = 33013691568.

The previous prime is 66031222529. The next prime is 66031222577. The reversal of 66031222568 is 86522213066.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88130 + ... + 373937.

It is an arithmetic number, because the mean of its divisors is an integer number (7738483830).

Almost surely, 2^66031222568 is an apocalyptic number.

It is an amenable number.

66031222568 is a deficient number, since it is larger than the sum of its proper divisors (57784518712).

66031222568 is a wasteful number, since it uses less digits than its factorization.

66031222568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479936 (or 479932 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 66031222568 in words is "sixty-six billion, thirty-one million, two hundred twenty-two thousand, five hundred sixty-eight".