67662256993 has 2 divisors, whose sum is σ = 67662256994. Its totient is φ = 67662256992.

The previous prime is 67662256969. The next prime is 67662256997. The reversal of 67662256993 is 39965226676.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67611960529 + 50296464 = 260023^2 + 7092^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67662256993 is a prime.

It is not a weakly prime, because it can be changed into another prime (67662256997) 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 as a sum of consecutive naturals, namely, 33831128496 + 33831128497.

It is an arithmetic number, because the mean of its divisors is an integer number (33831128497).

Almost surely, 2^67662256993 is an apocalyptic number.

It is an amenable number.

67662256993 is a deficient number, since it is larger than the sum of its proper divisors (1).

67662256993 is an equidigital number, since it uses as much as digits as its factorization.

67662256993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44089920, while the sum is 61.

The spelling of 67662256993 in words is "sixty-seven billion, six hundred sixty-two million, two hundred fifty-six thousand, nine hundred ninety-three".