67946561776 has 20 divisors (see below), whose sum is σ = 131661644544. Its totient is φ = 33969363200.

The previous prime is 67946561759. The next prime is 67946561779. The reversal of 67946561776 is 67716564976.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67946561779) 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 3 ways as a sum of consecutive naturals, for example, 99145 + ... + 381736.

Almost surely, 2^67946561776 is an apocalyptic number.

It is an amenable number.

67946561776 is a deficient number, since it is larger than the sum of its proper divisors (63715082768).

67946561776 is a wasteful number, since it uses less digits than its factorization.

67946561776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489720 (or 489714 counting only the distinct ones).

The product of its digits is 80015040, while the sum is 64.

The spelling of 67946561776 in words is "sixty-seven billion, nine hundred forty-six million, five hundred sixty-one thousand, seven hundred seventy-six".