67016877817 has 2 divisors, whose sum is σ = 67016877818. Its totient is φ = 67016877816.

The previous prime is 67016877761. The next prime is 67016877821. The reversal of 67016877817 is 71877861076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48786207376 + 18230670441 = 220876^2 + 135021^2 .

It is a cyclic number.

It is not a de Polignac number, because 67016877817 - 2¹¹ = 67016875769 is a prime.

It is not a weakly prime, because it can be changed into another prime (67016877017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33508438908 + 33508438909.

It is an arithmetic number, because the mean of its divisors is an integer number (33508438909).

Almost surely, 2^67016877817 is an apocalyptic number.

It is an amenable number.

67016877817 is a deficient number, since it is larger than the sum of its proper divisors (1).

67016877817 is an equidigital number, since it uses as much as digits as its factorization.

67016877817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5531904, while the sum is 58.

The spelling of 67016877817 in words is "sixty-seven billion, sixteen million, eight hundred seventy-seven thousand, eight hundred seventeen".