67686739309 has 16 divisors (see below), whose sum is σ = 78174327168. Its totient is φ = 57405422592.

The previous prime is 67686739279. The next prime is 67686739313. The reversal of 67686739309 is 90393768676.

It is not a de Polignac number, because 67686739309 - 2¹³ = 67686731117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67686739409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 391429 + ... + 537205.

It is an arithmetic number, because the mean of its divisors is an integer number (4885895448).

Almost surely, 2^67686739309 is an apocalyptic number.

It is an amenable number.

67686739309 is a deficient number, since it is larger than the sum of its proper divisors (10487587859).

67686739309 is a wasteful number, since it uses less digits than its factorization.

67686739309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146484.

The product of its (nonzero) digits is 61725888, while the sum is 64.

The spelling of 67686739309 in words is "sixty-seven billion, six hundred eighty-six million, seven hundred thirty-nine thousand, three hundred nine".