67136704668 has 72 divisors (see below), whose sum is σ = 194878494720. Its totient is φ = 19273692960.

The previous prime is 67136704667. The next prime is 67136704693. The reversal of 67136704668 is 86640763176.

It is a super-2 number, since 2×67136704668² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67136704667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4453980 + ... + 4469027.

It is an arithmetic number, because the mean of its divisors is an integer number (2706645760).

Almost surely, 2^67136704668 is an apocalyptic number.

It is an amenable number.

67136704668 is an abundant number, since it is smaller than the sum of its proper divisors (127741790052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67136704668 is a wasteful number, since it uses less digits than its factorization.

67136704668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8923047 (or 8923042 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 67136704668 in words is "sixty-seven billion, one hundred thirty-six million, seven hundred four thousand, six hundred sixty-eight".