67374882821 has 2 divisors, whose sum is σ = 67374882822. Its totient is φ = 67374882820.

The previous prime is 67374882811. The next prime is 67374882847. The reversal of 67374882821 is 12828847376.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65183706721 + 2191176100 = 255311^2 + 46810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67374882821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67374882811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33687441410 + 33687441411.

It is an arithmetic number, because the mean of its divisors is an integer number (33687441411).

Almost surely, 2^67374882821 is an apocalyptic number.

It is an amenable number.

67374882821 is a deficient number, since it is larger than the sum of its proper divisors (1).

67374882821 is an equidigital number, since it uses as much as digits as its factorization.

67374882821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7225344, while the sum is 56.

The spelling of 67374882821 in words is "sixty-seven billion, three hundred seventy-four million, eight hundred eighty-two thousand, eight hundred twenty-one".