67840005679 has 8 divisors (see below), whose sum is σ = 70117305728. Its totient is φ = 65586062880.

The previous prime is 67840005661. The next prime is 67840005697. The reversal of 67840005679 is 97650004876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67840005661) and next prime (67840005697).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67840005679 - 2¹³ = 67839997487 is a prime.

It is a super-3 number, since 3×67840005679³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67840005179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5833407 + ... + 5845024.

It is an arithmetic number, because the mean of its divisors is an integer number (8764663216).

Almost surely, 2^67840005679 is an apocalyptic number.

67840005679 is a deficient number, since it is larger than the sum of its proper divisors (2277300049).

67840005679 is a wasteful number, since it uses less digits than its factorization.

67840005679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11678625.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 67840005679 in words is "sixty-seven billion, eight hundred forty million, five thousand, six hundred seventy-nine".