67668137109 has 12 divisors (see below), whose sum is σ = 97759789452. Its totient is φ = 45104280000.

The previous prime is 67668137107. The next prime is 67668137113. The reversal of 67668137109 is 90173186676.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 61419708900 + 6248428209 = 247830^2 + 79047^2 .

It is not a de Polignac number, because 67668137109 - 2¹ = 67668137107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67668137107) 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 in 11 ways as a sum of consecutive naturals, for example, 595842 + ... + 700259.

It is an arithmetic number, because the mean of its divisors is an integer number (8146649121).

Almost surely, 2^67668137109 is an apocalyptic number.

It is an amenable number.

67668137109 is a deficient number, since it is larger than the sum of its proper divisors (30091652343).

67668137109 is a wasteful number, since it uses less digits than its factorization.

67668137109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301908 (or 1301905 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The spelling of 67668137109 in words is "sixty-seven billion, six hundred sixty-eight million, one hundred thirty-seven thousand, one hundred nine".