67421716635 has 64 divisors (see below), whose sum is σ = 137051873280. Its totient is φ = 27532707840.

The previous prime is 67421716603. The next prime is 67421716651. The reversal of 67421716635 is 53661712476.

It is a happy number.

It is not a de Polignac number, because 67421716635 - 2⁵ = 67421716603 is a prime.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 754350 + ... + 838979.

It is an arithmetic number, because the mean of its divisors is an integer number (2141435520).

Almost surely, 2^67421716635 is an apocalyptic number.

67421716635 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

67421716635 is an abundant number, since it is smaller than the sum of its proper divisors (69630156645).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67421716635 is a wasteful number, since it uses less digits than its factorization.

67421716635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593388.

The product of its digits is 1270080, while the sum is 48.

The spelling of 67421716635 in words is "sixty-seven billion, four hundred twenty-one million, seven hundred sixteen thousand, six hundred thirty-five".