67640976899 has 2 divisors, whose sum is σ = 67640976900. Its totient is φ = 67640976898.

The previous prime is 67640976869. The next prime is 67640976901. The reversal of 67640976899 is 99867904676.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67640976899 is a prime.

Together with 67640976901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67640976829) 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, 33820488449 + 33820488450.

It is an arithmetic number, because the mean of its divisors is an integer number (33820488450).

Almost surely, 2^67640976899 is an apocalyptic number.

67640976899 is a deficient number, since it is larger than the sum of its proper divisors (1).

67640976899 is an equidigital number, since it uses as much as digits as its factorization.

67640976899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246903552, while the sum is 71.

The spelling of 67640976899 in words is "sixty-seven billion, six hundred forty million, nine hundred seventy-six thousand, eight hundred ninety-nine".