67658980505 has 4 divisors (see below), whose sum is σ = 81190776612. Its totient is φ = 54127184400.

The previous prime is 67658980463. The next prime is 67658980507. The reversal of 67658980505 is 50508985676.

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 11541634624 + 56117345881 = 107432^2 + 236891^2 .

It is not a de Polignac number, because 67658980505 - 2¹⁶ = 67658914969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67658980507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6765898046 + ... + 6765898055.

It is an arithmetic number, because the mean of its divisors is an integer number (20297694153).

Almost surely, 2^67658980505 is an apocalyptic number.

It is an amenable number.

67658980505 is a deficient number, since it is larger than the sum of its proper divisors (13531796107).

67658980505 is a wasteful number, since it uses less digits than its factorization.

67658980505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13531796106.

The product of its (nonzero) digits is 18144000, while the sum is 59.

The spelling of 67658980505 in words is "sixty-seven billion, six hundred fifty-eight million, nine hundred eighty thousand, five hundred five".