67717923761 has 2 divisors, whose sum is σ = 67717923762. Its totient is φ = 67717923760.

The previous prime is 67717923701. The next prime is 67717923787. The reversal of 67717923761 is 16732971776.

67717923761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67454478400 + 263445361 = 259720^2 + 16231^2 .

It is a cyclic number.

It is not a de Polignac number, because 67717923761 - 2³⁴ = 50538054577 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67717923697 and 67717923706.

It is not a weakly prime, because it can be changed into another prime (67717923701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33858961880 + 33858961881.

It is an arithmetic number, because the mean of its divisors is an integer number (33858961881).

Almost surely, 2^67717923761 is an apocalyptic number.

It is an amenable number.

67717923761 is a deficient number, since it is larger than the sum of its proper divisors (1).

67717923761 is an equidigital number, since it uses as much as digits as its factorization.

67717923761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4667544, while the sum is 56.

The spelling of 67717923761 in words is "sixty-seven billion, seven hundred seventeen million, nine hundred twenty-three thousand, seven hundred sixty-one".