66890007068 has 24 divisors (see below), whose sum is σ = 117202100400. Its totient is φ = 33403724928.

The previous prime is 66890007061. The next prime is 66890007097. The reversal of 66890007068 is 86070009866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66890007061) 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 7 ways as a sum of consecutive naturals, for example, 17887943 + ... + 17891681.

It is an arithmetic number, because the mean of its divisors is an integer number (4883420850).

Almost surely, 2^66890007068 is an apocalyptic number.

It is an amenable number.

66890007068 is a deficient number, since it is larger than the sum of its proper divisors (50312093332).

66890007068 is a wasteful number, since it uses less digits than its factorization.

66890007068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8069 (or 8067 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 50.

The spelling of 66890007068 in words is "sixty-six billion, eight hundred ninety million, seven thousand, sixty-eight".