67420680755 has 4 divisors (see below), whose sum is σ = 80904816912. Its totient is φ = 53936544600.

The previous prime is 67420680751. The next prime is 67420680829. The reversal of 67420680755 is 55708602476.

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

It is not a de Polignac number, because 67420680755 - 2² = 67420680751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67420680751) 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, 6742068071 + ... + 6742068080.

It is an arithmetic number, because the mean of its divisors is an integer number (20226204228).

Almost surely, 2^67420680755 is an apocalyptic number.

67420680755 is a deficient number, since it is larger than the sum of its proper divisors (13484136157).

67420680755 is a wasteful number, since it uses less digits than its factorization.

67420680755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13484136156.

The product of its (nonzero) digits is 2822400, while the sum is 50.

The spelling of 67420680755 in words is "sixty-seven billion, four hundred twenty million, six hundred eighty thousand, seven hundred fifty-five".