67431033977 has 2 divisors, whose sum is σ = 67431033978. Its totient is φ = 67431033976.

The previous prime is 67431033947. The next prime is 67431034031. The reversal of 67431033977 is 77933013476.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33848272441 + 33582761536 = 183979^2 + 183256^2 .

It is a cyclic number.

It is not a de Polignac number, because 67431033977 - 2⁶ = 67431033913 is a prime.

It is not a weakly prime, because it can be changed into another prime (67431033947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33715516988 + 33715516989.

It is an arithmetic number, because the mean of its divisors is an integer number (33715516989).

Almost surely, 2^67431033977 is an apocalyptic number.

It is an amenable number.

67431033977 is a deficient number, since it is larger than the sum of its proper divisors (1).

67431033977 is an equidigital number, since it uses as much as digits as its factorization.

67431033977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000376, while the sum is 50.

The spelling of 67431033977 in words is "sixty-seven billion, four hundred thirty-one million, thirty-three thousand, nine hundred seventy-seven".