67715620073 has 4 divisors (see below), whose sum is σ = 71698891860. Its totient is φ = 63732348288.

The previous prime is 67715620069. The next prime is 67715620081. The reversal of 67715620073 is 37002651776.

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 48313358809 + 19402261264 = 219803^2 + 139292^2 .

It is not a de Polignac number, because 67715620073 - 2² = 67715620069 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67715620003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1991635868 + ... + 1991635901.

It is an arithmetic number, because the mean of its divisors is an integer number (17924722965).

Almost surely, 2^67715620073 is an apocalyptic number.

It is an amenable number.

67715620073 is a deficient number, since it is larger than the sum of its proper divisors (3983271787).

67715620073 is a wasteful number, since it uses less digits than its factorization.

67715620073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3983271786.

The product of its (nonzero) digits is 370440, while the sum is 44.

The spelling of 67715620073 in words is "sixty-seven billion, seven hundred fifteen million, six hundred twenty thousand, seventy-three".