67542716656 has 20 divisors (see below), whose sum is σ = 137751593800. Its totient is φ = 31993918272.

The previous prime is 67542716629. The next prime is 67542716671. The reversal of 67542716656 is 65661724576.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 67542716597 and 67542716606.

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 3 ways as a sum of consecutive naturals, for example, 111089691 + ... + 111090298.

It is an arithmetic number, because the mean of its divisors is an integer number (6887579690).

Almost surely, 2^67542716656 is an apocalyptic number.

It is an amenable number.

67542716656 is an abundant number, since it is smaller than the sum of its proper divisors (70208877144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67542716656 is a wasteful number, since it uses less digits than its factorization.

67542716656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222180016 (or 222180010 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 55.

The spelling of 67542716656 in words is "sixty-seven billion, five hundred forty-two million, seven hundred sixteen thousand, six hundred fifty-six".