67785666746 has 48 divisors (see below), whose sum is σ = 123510438144. Its totient is φ = 27767922336.

The previous prime is 67785666743. The next prime is 67785666797. The reversal of 67785666746 is 64766658776.

It is not an unprimeable number, because it can be changed into a prime (67785666743) 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 in 23 ways as a sum of consecutive naturals, for example, 3355151 + ... + 3375293.

It is an arithmetic number, because the mean of its divisors is an integer number (2573134128).

Almost surely, 2^67785666746 is an apocalyptic number.

67785666746 is a deficient number, since it is larger than the sum of its proper divisors (55724771398).

67785666746 is a wasteful number, since it uses less digits than its factorization.

67785666746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21675 (or 21668 counting only the distinct ones).

The product of its digits is 426746880, while the sum is 68.

The spelling of 67785666746 in words is "sixty-seven billion, seven hundred eighty-five million, six hundred sixty-six thousand, seven hundred forty-six".