67657424420 has 24 divisors (see below), whose sum is σ = 143677006200. Its totient is φ = 26758890752.

The previous prime is 67657424411. The next prime is 67657424489. The reversal of 67657424420 is 2442475676.

It can be written as a sum of positive squares in 4 ways, for example, as 3103826944 + 64553597476 = 55712^2 + 254074^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19003115 + ... + 19006674.

It is an arithmetic number, because the mean of its divisors is an integer number (5986541925).

Almost surely, 2^67657424420 is an apocalyptic number.

It is an amenable number.

67657424420 is an abundant number, since it is smaller than the sum of its proper divisors (76019581780).

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

67657424420 is a wasteful number, since it uses less digits than its factorization.

67657424420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38009887 (or 38009885 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 47.

The spelling of 67657424420 in words is "sixty-seven billion, six hundred fifty-seven million, four hundred twenty-four thousand, four hundred twenty".