67678817435672 has 64 divisors (see below), whose sum is σ = 132943160044800. Its totient is φ = 32257511117440.

The previous prime is 67678817435587. The next prime is 67678817435729. The reversal of 67678817435672 is 27653471887676.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 67678817435593 and 67678817435602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27932783 + ... + 30258849.

It is an arithmetic number, because the mean of its divisors is an integer number (2077236875700).

Almost surely, 2^{67678817435672} is an apocalyptic number.

It is an amenable number.

67678817435672 is a deficient number, since it is larger than the sum of its proper divisors (65264342609128).

67678817435672 is a wasteful number, since it uses less digits than its factorization.

67678817435672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327696 (or 2327692 counting only the distinct ones).

The product of its digits is 3982970880, while the sum is 77.

The spelling of 67678817435672 in words is "sixty-seven trillion, six hundred seventy-eight billion, eight hundred seventeen million, four hundred thirty-five thousand, six hundred seventy-two".