67931281366 has 16 divisors (see below), whose sum is σ = 110706259104. Its totient is φ = 31075438464.

The previous prime is 67931281357. The next prime is 67931281373. The reversal of 67931281366 is 66318213976.

It is a happy number.

It is a super-2 number, since 2×67931281366² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11557866 + ... + 11563741.

It is an arithmetic number, because the mean of its divisors is an integer number (6919141194).

Almost surely, 2^67931281366 is an apocalyptic number.

67931281366 is a deficient number, since it is larger than the sum of its proper divisors (42774977738).

67931281366 is a wasteful number, since it uses less digits than its factorization.

67931281366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23121735.

The product of its digits is 1959552, while the sum is 52.

The spelling of 67931281366 in words is "sixty-seven billion, nine hundred thirty-one million, two hundred eighty-one thousand, three hundred sixty-six".