67006420847 has 4 divisors (see below), whose sum is σ = 67157677320. Its totient is φ = 66855164376.

The previous prime is 67006420841. The next prime is 67006420849. The reversal of 67006420847 is 74802460076.

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

It is a cyclic number.

It is not a de Polignac number, because 67006420847 - 2⁶ = 67006420783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 67006420798 and 67006420807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67006420841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75627572 + ... + 75628457.

It is an arithmetic number, because the mean of its divisors is an integer number (16789419330).

Almost surely, 2^67006420847 is an apocalyptic number.

67006420847 is a deficient number, since it is larger than the sum of its proper divisors (151256473).

67006420847 is a wasteful number, since it uses less digits than its factorization.

67006420847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151256472.

The product of its (nonzero) digits is 451584, while the sum is 44.

The spelling of 67006420847 in words is "sixty-seven billion, six million, four hundred twenty thousand, eight hundred forty-seven".