67668137099 has 4 divisors (see below), whose sum is σ = 67788329736. Its totient is φ = 67547944464.

The previous prime is 67668137077. The next prime is 67668137107. The reversal of 67668137099 is 99073186676.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67668137099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67668137039) 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 3 ways as a sum of consecutive naturals, for example, 60095474 + ... + 60096599.

It is an arithmetic number, because the mean of its divisors is an integer number (16947082434).

Almost surely, 2^67668137099 is an apocalyptic number.

67668137099 is a deficient number, since it is larger than the sum of its proper divisors (120192637).

67668137099 is a wasteful number, since it uses less digits than its factorization.

67668137099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120192636.

The product of its (nonzero) digits is 20575296, while the sum is 62.

Adding to 67668137099 its sum of digits (62), we get a square (67668137161 = 260131²).

The spelling of 67668137099 in words is "sixty-seven billion, six hundred sixty-eight million, one hundred thirty-seven thousand, ninety-nine".