67420544705 has 4 divisors (see below), whose sum is σ = 80904653652. Its totient is φ = 53936435760.

The previous prime is 67420544687. The next prime is 67420544717. The reversal of 67420544705 is 50744502476.

It is a happy number.

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 19303489969 + 48117054736 = 138937^2 + 219356^2 .

It is not a de Polignac number, because 67420544705 - 2⁶ = 67420544641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6742054466 + ... + 6742054475.

It is an arithmetic number, because the mean of its divisors is an integer number (20226163413).

Almost surely, 2^67420544705 is an apocalyptic number.

It is an amenable number.

67420544705 is a deficient number, since it is larger than the sum of its proper divisors (13484108947).

67420544705 is a wasteful number, since it uses less digits than its factorization.

67420544705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484108946.

The product of its (nonzero) digits is 940800, while the sum is 44.

The spelling of 67420544705 in words is "sixty-seven billion, four hundred twenty million, five hundred forty-four thousand, seven hundred five".