67679583421 has 2 divisors, whose sum is σ = 67679583422. Its totient is φ = 67679583420.

The previous prime is 67679583407. The next prime is 67679583449. The reversal of 67679583421 is 12438597676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66731805625 + 947777796 = 258325^2 + 30786^2 .

It is a cyclic number.

It is not a de Polignac number, because 67679583421 - 2¹¹ = 67679581373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67679583451) 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, 33839791710 + 33839791711.

It is an arithmetic number, because the mean of its divisors is an integer number (33839791711).

Almost surely, 2^67679583421 is an apocalyptic number.

It is an amenable number.

67679583421 is a deficient number, since it is larger than the sum of its proper divisors (1).

67679583421 is an equidigital number, since it uses as much as digits as its factorization.

67679583421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 58.

The spelling of 67679583421 in words is "sixty-seven billion, six hundred seventy-nine million, five hundred eighty-three thousand, four hundred twenty-one".