67839670757 has 4 divisors (see below), whose sum is σ = 68040975756. Its totient is φ = 67638365760.

The previous prime is 67839670741. The next prime is 67839670763. The reversal of 67839670757 is 75707693876.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29517301636 + 38322369121 = 171806^2 + 195761^2 .

It is a cyclic number.

It is not a de Polignac number, because 67839670757 - 2⁴ = 67839670741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67839670693 and 67839670702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67839670727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100651994 + ... + 100652667.

It is an arithmetic number, because the mean of its divisors is an integer number (17010243939).

Almost surely, 2^67839670757 is an apocalyptic number.

It is an amenable number.

67839670757 is a deficient number, since it is larger than the sum of its proper divisors (201304999).

67839670757 is a wasteful number, since it uses less digits than its factorization.

67839670757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201304998.

The product of its (nonzero) digits is 93350880, while the sum is 65.

The spelling of 67839670757 in words is "sixty-seven billion, eight hundred thirty-nine million, six hundred seventy thousand, seven hundred fifty-seven".