67668657424 has 15 divisors (see below), whose sum is σ = 131110039813. Its totient is φ = 33833808448.

The previous prime is 67668657389. The next prime is 67668657481. The reversal of 67668657424 is 42475686676.

It is a happy number.

The square root of 67668657424 is 260132.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 63473763600 + 4194893824 = 251940^2 + 64768^2 .

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 1008012 + ... + 1073044.

Almost surely, 2^67668657424 is an apocalyptic number.

67668657424 is the 260132-nd square number.

It is an amenable number.

67668657424 is a deficient number, since it is larger than the sum of its proper divisors (63441382389).

67668657424 is an frugal number, since it uses more digits than its factorization.

67668657424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130074 (or 65035 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 61.

The spelling of 67668657424 in words is "sixty-seven billion, six hundred sixty-eight million, six hundred fifty-seven thousand, four hundred twenty-four".