67640286271 has 2 divisors, whose sum is σ = 67640286272. Its totient is φ = 67640286270.

The previous prime is 67640286193. The next prime is 67640286323. The reversal of 67640286271 is 17268204676.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67640286271 - 2⁷ = 67640286143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67640289271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33820143135 + 33820143136.

It is an arithmetic number, because the mean of its divisors is an integer number (33820143136).

Almost surely, 2^67640286271 is an apocalyptic number.

67640286271 is a deficient number, since it is larger than the sum of its proper divisors (1).

67640286271 is an equidigital number, since it uses as much as digits as its factorization.

67640286271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 49.

The spelling of 67640286271 in words is "sixty-seven billion, six hundred forty million, two hundred eighty-six thousand, two hundred seventy-one".