67696821861 has 8 divisors (see below), whose sum is σ = 90328755264. Its totient is φ = 45098051520.

The previous prime is 67696821851. The next prime is 67696821869. The reversal of 67696821861 is 16812869676.

67696821861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 67696821861 - 2⁹ = 67696821349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67696821795 and 67696821804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67696821869) 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, 8286001 + ... + 8294166.

It is an arithmetic number, because the mean of its divisors is an integer number (11291094408).

Almost surely, 2^67696821861 is an apocalyptic number.

It is an amenable number.

67696821861 is a deficient number, since it is larger than the sum of its proper divisors (22631933403).

67696821861 is a wasteful number, since it uses less digits than its factorization.

67696821861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16581531.

The product of its digits is 10450944, while the sum is 60.

The spelling of 67696821861 in words is "sixty-seven billion, six hundred ninety-six million, eight hundred twenty-one thousand, eight hundred sixty-one".